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All questions of Animal Life for Grade 4 Exam
Camouflage is a kind of adaptation in which an organism deceives others by merging its colour with that of its surroundings. Which of the following colours will best suit a chameleon to hide from its enemies in a forest when it sits on branch of a tree?- a)Red
- b)Blue
- c)Green
- d)Brown
Correct answer is option 'D'. Can you explain this answer?
Camouflage is a kind of adaptation in which an organism deceives others by merging its colour with that of its surroundings. Which of the following colours will best suit a chameleon to hide from its enemies in a forest when it sits on branch of a tree?
a)
Red
b)
Blue
c)
Green
d)
Brown
|
Sudhir Mehta answered |
A chameleon changes its skin colour to brown when it sits on the branch of a tree.
Which of these helps the whale to protect itself in cold temperatures?- a)Long tail
- b)Thick fur
- c)A thick layer of fat
- d)A hump
Correct answer is option 'C'. Can you explain this answer?
Which of these helps the whale to protect itself in cold temperatures?
a)
Long tail
b)
Thick fur
c)
A thick layer of fat
d)
A hump
|
|
Sudhir Mehta answered |
A thick layer of fat in whales help them in protecting themselves in the cold weather.
The eggs of a frog are called- a)spawn.
- b)larva.
- c)cocoon.
- d)pupa.
Correct answer is option 'A'. Can you explain this answer?
The eggs of a frog are called
a)
spawn.
b)
larva.
c)
cocoon.
d)
pupa.
|
|
Sudhir Mehta answered |
The eggs of frogs are called spawn.
Digestion start in our- a)intestine
- b)none of these
- c)mouth
- d)Stomach
Correct answer is option 'C'. Can you explain this answer?
Digestion start in our
a)
intestine
b)
none of these
c)
mouth
d)
Stomach
|
|
Sudhir Mehta answered |
- Digestion begins in the mouth.
- The food is ground up by the teeth and moistened with saliva to make it easy to swallow.
Tigers and leopards have stripes on their bodies. How does this adaptation help them?- a)In keeping their bodies cool.
- b)In keeping their bodies hot.
- c)In mixing with the surroundings.
- d)In looking beautiful.
Correct answer is option 'C'. Can you explain this answer?
Tigers and leopards have stripes on their bodies. How does this adaptation help them?
a)
In keeping their bodies cool.
b)
In keeping their bodies hot.
c)
In mixing with the surroundings.
d)
In looking beautiful.
|
|
Sudhir Mehta answered |
Tigers and leopards have stripes on their bodies to mix with their surroundings.
A baby 'X' breathes through its gills. An adult 'X? breathes through its lung on land. What is X?- a)Whale
- b)Crocodile
- c)Fish
- d)Frog
Correct answer is option 'D'. Can you explain this answer?
A baby 'X' breathes through its gills. An adult 'X? breathes through its lung on land. What is X?
a)
Whale
b)
Crocodile
c)
Fish
d)
Frog
|
Prabhat mehra answered |
**Explanation:**
The correct answer is option **D) Frog**.
Frogs are amphibians, which means they can live both in water and on land. They undergo a process called metamorphosis, where they start their life as aquatic creatures and later develop into terrestrial animals.
Here is an explanation of why the answer is a frog:
**1. Breathing through Gills:**
- When a frog is in its larval stage, it is called a tadpole. Tadpoles have gills and they use them to breathe underwater, just like fish. They extract oxygen from the water through their gills.
**2. Transition to Lungs:**
- As the tadpole grows and undergoes metamorphosis, it starts developing lungs. This is a crucial step in the life cycle of a frog as it enables them to breathe on land.
- During metamorphosis, the tadpole gradually loses its gills and develops lungs. The gills are replaced by lungs, and the tail is absorbed into the body.
**3. Breathing on Land:**
- After metamorphosis, the frog becomes an adult and is capable of breathing air using its lungs. It no longer relies on gills for respiration.
- Adult frogs have a specialized respiratory system that allows them to breathe on land. They have a pair of lungs that help them extract oxygen from the air just like humans do.
In summary, while baby frogs (tadpoles) breathe through their gills underwater, adult frogs breathe through their lungs on land. This transition from gills to lungs during metamorphosis is a key characteristic of frogs, making them the correct answer to the given question.
The correct answer is option **D) Frog**.
Frogs are amphibians, which means they can live both in water and on land. They undergo a process called metamorphosis, where they start their life as aquatic creatures and later develop into terrestrial animals.
Here is an explanation of why the answer is a frog:
**1. Breathing through Gills:**
- When a frog is in its larval stage, it is called a tadpole. Tadpoles have gills and they use them to breathe underwater, just like fish. They extract oxygen from the water through their gills.
**2. Transition to Lungs:**
- As the tadpole grows and undergoes metamorphosis, it starts developing lungs. This is a crucial step in the life cycle of a frog as it enables them to breathe on land.
- During metamorphosis, the tadpole gradually loses its gills and develops lungs. The gills are replaced by lungs, and the tail is absorbed into the body.
**3. Breathing on Land:**
- After metamorphosis, the frog becomes an adult and is capable of breathing air using its lungs. It no longer relies on gills for respiration.
- Adult frogs have a specialized respiratory system that allows them to breathe on land. They have a pair of lungs that help them extract oxygen from the air just like humans do.
In summary, while baby frogs (tadpoles) breathe through their gills underwater, adult frogs breathe through their lungs on land. This transition from gills to lungs during metamorphosis is a key characteristic of frogs, making them the correct answer to the given question.
The surroundings in which an animal lives and grows is called its- a)Climate
- b)Habitat
- c)Behavior
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
The surroundings in which an animal lives and grows is called its
a)
Climate
b)
Habitat
c)
Behavior
d)
None of these
|
Rohit Chawla answered |
**Habitat: The Surroundings of an Animal**
The correct answer is option 'B' - Habitat.
**Explanation:**
A habitat is the specific area or surroundings where an animal lives, grows, and finds all the necessary resources for survival. It provides food, water, shelter, and other essential conditions required by the animal to thrive and reproduce.
**Characteristics of a Habitat:**
1. **Physical Environment:** A habitat includes both the biotic (living) and abiotic (non-living) components. It encompasses various factors such as climate, soil, water availability, temperature, light intensity, and geographical features.
2. **Food and Water Sources:** Animals depend on their habitat to provide suitable food and water sources. Different habitats support different types of plants, insects, or prey animals that serve as food sources for specific species.
3. **Shelter:** Habitats offer different types of shelter, such as trees, burrows, caves, or coral reefs, depending on the environment. These shelters protect animals from predators, extreme weather conditions, and provide a safe place to rest or raise their young.
4. **Suitable Conditions for Reproduction:** Animals require a habitat that provides suitable conditions for reproduction. This includes appropriate mating areas, nesting sites, or breeding grounds, which are essential for the continuation of the species.
**Examples of Habitats:**
1. **Forest:** A forest habitat consists of a dense growth of trees, shrubs, and plants. It provides a diverse ecosystem with a wide variety of animals, birds, insects, and reptiles.
2. **Desert:** A desert habitat is characterized by extreme aridity and limited water availability. Animals living in deserts have adaptations to conserve water and withstand high temperatures.
3. **Ocean:** The ocean habitat includes various zones such as coral reefs, deep sea, and coastal areas. It supports a wide range of marine life, including fish, mammals, crustaceans, and algae.
4. **Grassland:** Grasslands are vast areas covered with grass and few scattered trees. They are home to grazing animals like zebras, antelopes, and bison.
In conclusion, a habitat plays a crucial role in determining an animal's survival and well-being. It provides the necessary resources and conditions for an animal to live, grow, and reproduce successfully.
The correct answer is option 'B' - Habitat.
**Explanation:**
A habitat is the specific area or surroundings where an animal lives, grows, and finds all the necessary resources for survival. It provides food, water, shelter, and other essential conditions required by the animal to thrive and reproduce.
**Characteristics of a Habitat:**
1. **Physical Environment:** A habitat includes both the biotic (living) and abiotic (non-living) components. It encompasses various factors such as climate, soil, water availability, temperature, light intensity, and geographical features.
2. **Food and Water Sources:** Animals depend on their habitat to provide suitable food and water sources. Different habitats support different types of plants, insects, or prey animals that serve as food sources for specific species.
3. **Shelter:** Habitats offer different types of shelter, such as trees, burrows, caves, or coral reefs, depending on the environment. These shelters protect animals from predators, extreme weather conditions, and provide a safe place to rest or raise their young.
4. **Suitable Conditions for Reproduction:** Animals require a habitat that provides suitable conditions for reproduction. This includes appropriate mating areas, nesting sites, or breeding grounds, which are essential for the continuation of the species.
**Examples of Habitats:**
1. **Forest:** A forest habitat consists of a dense growth of trees, shrubs, and plants. It provides a diverse ecosystem with a wide variety of animals, birds, insects, and reptiles.
2. **Desert:** A desert habitat is characterized by extreme aridity and limited water availability. Animals living in deserts have adaptations to conserve water and withstand high temperatures.
3. **Ocean:** The ocean habitat includes various zones such as coral reefs, deep sea, and coastal areas. It supports a wide range of marine life, including fish, mammals, crustaceans, and algae.
4. **Grassland:** Grasslands are vast areas covered with grass and few scattered trees. They are home to grazing animals like zebras, antelopes, and bison.
In conclusion, a habitat plays a crucial role in determining an animal's survival and well-being. It provides the necessary resources and conditions for an animal to live, grow, and reproduce successfully.
Which liquid mix with food in our mouth?- a)Saliva
- b)Milk
- c)Cold drinks
- d)Water
Correct answer is option 'A'. Can you explain this answer?
Which liquid mix with food in our mouth?
a)
Saliva
b)
Milk
c)
Cold drinks
d)
Water
|
Yashina Kapoor answered |
- The substance that is mixed with food in the mouth during chewing is Saliva.
- Saliva is produced from salivary glands.
- Saliva is important to lubricate your mouth.
Animal 'X' eats plant parts. It gives birth to young ones and feeds them with milk. Identify the animal 'X'- a)Fox
- b)Goat
- c)Tiger
- d)Lion
Correct answer is option 'B'. Can you explain this answer?
Animal 'X' eats plant parts. It gives birth to young ones and feeds them with milk. Identify the animal 'X'
a)
Fox
b)
Goat
c)
Tiger
d)
Lion
|
Snehal Sengupta answered |
Animal X that eats plant parts, gives birth to young ones and feeds them with milk is a goat.
Explanation:
Therefore, the correct answer is option B, Goat.
Explanation:
- Eating plant parts: The first characteristic mentioned is that the animal X eats plant parts. Goats are herbivores and feed on leaves, grass, and other plant materials.
- Giving birth to young ones: The second characteristic is that the animal X gives birth to young ones. Goats are mammals and give birth to live young ones.
- Feeding young ones with milk: The third characteristic is that the animal X feeds its young ones with milk. Goats are known for their milk production and are often raised for their milk.
- Elimination of other options: Option A, Fox, is a carnivore and does not eat plant parts. Option C, Tiger, is also a carnivore and does not feed on plant parts. Option D, Lion, is also a carnivore and does not feed on plant parts.
Therefore, the correct answer is option B, Goat.
Which of the following body parts maintain balance in a monkey?- a)Tail
- b)Neck
- c)Legs
- d)Abdomen
Correct answer is option 'A'. Can you explain this answer?
Which of the following body parts maintain balance in a monkey?
a)
Tail
b)
Neck
c)
Legs
d)
Abdomen
|
|
Sudhir Mehta answered |
The tail of a monkey helps it in maintaining the balance of body.
Tadpoles respire through- a)lungs.
- b)skin.
- c)fins.
- d)gills.
Correct answer is option 'D'. Can you explain this answer?
Tadpoles respire through
a)
lungs.
b)
skin.
c)
fins.
d)
gills.
|
|
Sudhir Mehta answered |
Tadpoles resemble the fish. They respires through gills.
How do polar bears keep themselves warm in icy environments?- a)By migrating to warmer areas
- b)By building nests
- c)By having a thick layer of blubber and fur
- d)By changing color to blend in
Correct answer is option 'C'. Can you explain this answer?
a)
By migrating to warmer areas
b)
By building nests
c)
By having a thick layer of blubber and fur
d)
By changing color to blend in
|
Nclex Coaching Centre answered |
Polar bears stay warm in icy environments thanks to their thick layer of blubber and dense fur. These adaptations provide insulation against the cold temperatures and help them maintain their body heat.
Which animal has a special adaptation to help it find food in the dark?- a)Bat
- b)Lion
- c)Eagle
- d)Whale
Correct answer is option 'A'. Can you explain this answer?
a)
Bat
b)
Lion
c)
Eagle
d)
Whale
|
|
Aarini Wali answered |
Bats navigate and find insect prey using echolocation. They produce sound waves at frequencies above human hearing, called ultrasound. The sound waves that is emitted by bats bounce off objects in their environment.
Following are adaptation of animals for terrestrial habitat.(i) They have strong claws that can be withdrawn inside their toes
(ii) They have eyes on both the sides of their heads.
(iii) They are light brown in color.
(iv)They have strong, flat hind teeth for chewing.
(v) They move in herds
(vi) They have eyes in front of their faces.Q. Select the option that correctly categories the given adaptation for predator and prey animals.- a)
- b)
- c)
- d)
Correct answer is option 'C'. Can you explain this answer?
Following are adaptation of animals for terrestrial habitat.
(i) They have strong claws that can be withdrawn inside their toes
(ii) They have eyes on both the sides of their heads.
(iii) They are light brown in color.
(iv)They have strong, flat hind teeth for chewing.
(v) They move in herds
(vi) They have eyes in front of their faces.
(ii) They have eyes on both the sides of their heads.
(iii) They are light brown in color.
(iv)They have strong, flat hind teeth for chewing.
(v) They move in herds
(vi) They have eyes in front of their faces.
Q. Select the option that correctly categories the given adaptation for predator and prey animals.
a)
b)
c)
d)
|
Learning Education answered |
Predator and Prey Adaptations
Adaptations for Predators:
- They have strong claws that can be withdrawn inside their toes.
- They have eyes in front of their faces.
Adaptations for Prey:
- They have eyes on both sides of their heads.
- They are light brown in color.
- They have strong, flat hind teeth for chewing.
- They move in herds.
Explanation:
Predators are animals that hunt and kill other animals for food, while prey are the animals that are hunted and killed by predators. The adaptations listed above can be categorized as follows:
Predator Adaptations:
- Strong claws: Predators need strong claws to catch and hold onto their prey.
- Eyes in front of their faces: Predators usually have forward-facing eyes, which provide them with binocular vision and depth perception, helping them accurately judge distances and pounce on their prey.
Prey Adaptations:
- Eyes on both sides of their heads: Prey animals have eyes positioned on the sides of their heads, giving them a wider field of vision to detect predators approaching from various directions.
- Light brown color: Prey animals often have light brown or camouflage colors to blend in with their surroundings, making it harder for predators to spot them.
- Strong, flat hind teeth: Prey animals need strong, flat hind teeth for chewing and grinding tough plant material for food.
- Herd behavior: Moving in herds provides safety in numbers for prey animals, as it reduces the chance of an individual being targeted by a predator. It also increases the chances of detecting predators early and allows for coordinated defense mechanisms.
Thus, the given adaptations correspond to prey animals. The correct answer is option C.
Adaptations for Predators:
- They have strong claws that can be withdrawn inside their toes.
- They have eyes in front of their faces.
Adaptations for Prey:
- They have eyes on both sides of their heads.
- They are light brown in color.
- They have strong, flat hind teeth for chewing.
- They move in herds.
Explanation:
Predators are animals that hunt and kill other animals for food, while prey are the animals that are hunted and killed by predators. The adaptations listed above can be categorized as follows:
Predator Adaptations:
- Strong claws: Predators need strong claws to catch and hold onto their prey.
- Eyes in front of their faces: Predators usually have forward-facing eyes, which provide them with binocular vision and depth perception, helping them accurately judge distances and pounce on their prey.
Prey Adaptations:
- Eyes on both sides of their heads: Prey animals have eyes positioned on the sides of their heads, giving them a wider field of vision to detect predators approaching from various directions.
- Light brown color: Prey animals often have light brown or camouflage colors to blend in with their surroundings, making it harder for predators to spot them.
- Strong, flat hind teeth: Prey animals need strong, flat hind teeth for chewing and grinding tough plant material for food.
- Herd behavior: Moving in herds provides safety in numbers for prey animals, as it reduces the chance of an individual being targeted by a predator. It also increases the chances of detecting predators early and allows for coordinated defense mechanisms.
Thus, the given adaptations correspond to prey animals. The correct answer is option C.
Which of the following gives birth to babies?- a)Snake
- b)Cockroach
- c)Lion
- d)Butterfly
Correct answer is option 'C'. Can you explain this answer?
Which of the following gives birth to babies?
a)
Snake
b)
Cockroach
c)
Lion
d)
Butterfly
|
|
Sudhir Mehta answered |
Lion is a mammal. Mammals give birth to their young ones and feed them with their milk.
What feature of a camel helps it survive in a desert environment?
- a)Long legs
- b)Thick fur
- c)Ability to store water
- d)Large ears
Correct answer is option 'C'. Can you explain this answer?
What feature of a camel helps it survive in a desert environment?
a)
Long legs
b)
Thick fur
c)
Ability to store water
d)
Large ears
|
|
Aarini Wali answered |
The camels have fat in its humps which store water.
How does the process of digestion end in the body? - a)The food gets turned into sugar in the stomach
- b)The food moves from the small intestine to the large intestine
- c)The digested food is absorbed by the blood in the body
- d)The undigested food is removed from the body through the anus
Correct answer is option 'D'. Can you explain this answer?
How does the process of digestion end in the body?
a)
The food gets turned into sugar in the stomach
b)
The food moves from the small intestine to the large intestine
c)
The digested food is absorbed by the blood in the body
d)
The undigested food is removed from the body through the anus
|
Riya Singh answered |
The process of digestion ends in our body when the undigested food leaves our body through a special opening called the anus. This is how our body gets rid of the food that it cannot use to give us energy and keep us healthy.
Which of the following animals breathe through body holes?
- a)
- b)
- c)
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Which of the following animals breathe through body holes?
a)
b)
c)
d)
None of these
|
Indu Gupta answered |
The correct answer is Option A.
- Grasshopper (Option A): Grasshoppers breathe through tiny openings known as spiracles located on the sides of their bodies.
- These spiracles allow air to enter their tracheal system, facilitating respiration directly to their tissues.
Animals That Do Not Breathe Through Body Holes:
- Lizard (Option B): Lizards breathe through their nostrils and lungs. They do not have body holes for respiration.
- Rat (Option C): Rats breathe through their nostrils and lungs. They do not have body holes for respiration.
Which of the following is an incorrect statement regarding the given animals?
- a)X is omnivore, Y is herbivores and Z is a carnivore.
- b)X and Y are herbivores, while Z is an omnivore.
- c)X, Y and Z are carnivores
- d)All of these
Correct answer is option 'A'. Can you explain this answer?
Which of the following is an incorrect statement regarding the given animals?
a)
X is omnivore, Y is herbivores and Z is a carnivore.
b)
X and Y are herbivores, while Z is an omnivore.
c)
X, Y and Z are carnivores
d)
All of these
|
Gopal Mishra answered |
A
Which of the following birds can survive in cold winter in Polar Regions?- a)Ostrich
- b)Emu
- c)Penguin
- d)Siberian crane
Correct answer is option 'C'. Can you explain this answer?
Which of the following birds can survive in cold winter in Polar Regions?
a)
Ostrich
b)
Emu
c)
Penguin
d)
Siberian crane
|
Yashvi Mehra answered |
Survival of Birds in Cold Winter in Polar Regions
Polar regions are known for their extremely cold temperatures and harsh environments, making it challenging for many animals to survive. However, some bird species have adapted to these conditions and have developed unique characteristics that enable them to thrive in these frigid areas. Among the given options, the bird that can survive in the cold winter of polar regions is the Penguin.
1. Penguin:
Penguins are well-known for their ability to survive in the icy conditions of the Polar Regions. These flightless birds have several adaptations that help them endure the extreme cold:
- Thick layer of blubber: Penguins have a thick layer of blubber, which acts as insulation to keep their bodies warm in freezing temperatures. This layer also helps them float in water.
- Waterproof feathers: Penguins have special feathers that are tightly packed and overlap, forming a waterproof barrier. This keeps their bodies dry and prevents heat loss when they swim in freezing waters.
- Huddle behavior: Penguins often huddle together in large groups to conserve heat. By standing close to each other, they create a windbreak and collectively maintain a warmer microclimate within the huddle.
- Counter-current heat exchange: Penguins have a unique circulatory system that allows them to minimize heat loss. Warm blood from their heart circulates close to cold blood returning from their extremities. This heat exchange reduces heat loss through their feet and beaks.
- Adapted breeding cycles: Many penguin species time their breeding cycles to coincide with the Antarctic summer when food is abundant. By laying their eggs and raising chicks during this period, they increase the chances of survival for their offspring.
Conclusion:
Out of the given options, only the Penguin has the necessary adaptations to survive in the cold winter of Polar Regions. These adaptations include a thick layer of blubber, waterproof feathers, huddling behavior, counter-current heat exchange, and adapted breeding cycles. These unique characteristics enable penguins to thrive in the freezing temperatures and harsh conditions of the Polar Regions.
Polar regions are known for their extremely cold temperatures and harsh environments, making it challenging for many animals to survive. However, some bird species have adapted to these conditions and have developed unique characteristics that enable them to thrive in these frigid areas. Among the given options, the bird that can survive in the cold winter of polar regions is the Penguin.
1. Penguin:
Penguins are well-known for their ability to survive in the icy conditions of the Polar Regions. These flightless birds have several adaptations that help them endure the extreme cold:
- Thick layer of blubber: Penguins have a thick layer of blubber, which acts as insulation to keep their bodies warm in freezing temperatures. This layer also helps them float in water.
- Waterproof feathers: Penguins have special feathers that are tightly packed and overlap, forming a waterproof barrier. This keeps their bodies dry and prevents heat loss when they swim in freezing waters.
- Huddle behavior: Penguins often huddle together in large groups to conserve heat. By standing close to each other, they create a windbreak and collectively maintain a warmer microclimate within the huddle.
- Counter-current heat exchange: Penguins have a unique circulatory system that allows them to minimize heat loss. Warm blood from their heart circulates close to cold blood returning from their extremities. This heat exchange reduces heat loss through their feet and beaks.
- Adapted breeding cycles: Many penguin species time their breeding cycles to coincide with the Antarctic summer when food is abundant. By laying their eggs and raising chicks during this period, they increase the chances of survival for their offspring.
Conclusion:
Out of the given options, only the Penguin has the necessary adaptations to survive in the cold winter of Polar Regions. These adaptations include a thick layer of blubber, waterproof feathers, huddling behavior, counter-current heat exchange, and adapted breeding cycles. These unique characteristics enable penguins to thrive in the freezing temperatures and harsh conditions of the Polar Regions.
State whether the following statement is True or False:The animals which give birth to their young ones through eggs are called viviparous animals.- a)True
- b)False
Correct answer is option 'B'. Can you explain this answer?
State whether the following statement is True or False:
The animals which give birth to their young ones through eggs are called viviparous animals.
a)
True
b)
False
|
Learning Enablers answered |
- False. The statement is False.
- Oviparous animals are the ones that lay eggs to give birth to their young ones, not viviparous animals. Viviparous animals give birth to their young ones directly, not through eggs. For example, mammals like humans, dogs, and cats are viviparous animals because they give birth to live young ones.
Birds, some insects, and bats are examples of _____ animals.- a)Aquatic
- b)Aerial
- c)Terrestrial
- d)Arboreal
Correct answer is option 'B'. Can you explain this answer?
a)
Aquatic
b)
Aerial
c)
Terrestrial
d)
Arboreal
|
|
Nclex Coaching Centre answered |
Aerial animals are those that can fly, like birds, some insects, and bats. They have special features like wings and feathers that help them fly in the sky.
State whether the following statement is True or False:All animals move in search of food or to protect themselves and their babies from being hunted.- a)True
- b)False
Correct answer is option 'A'. Can you explain this answer?
State whether the following statement is True or False:
All animals move in search of food or to protect themselves and their babies from being hunted.
a)
True
b)
False
|
Edu Impact answered |
- When animals move, they might be looking for food to eat or they might be trying to stay safe from other animals that want to catch them.
- Sometimes, animals also move to find a safe place to have their babies.
- So, the statement that says all animals move in search of food or to protect themselves and their babies from being hunted is True.
Aerial animals are animals which spend most of their time- a)in water.
- b)in air.
- c)on land.
- d)underground.
Correct answer is option 'B'. Can you explain this answer?
Aerial animals are animals which spend most of their time
a)
in water.
b)
in air.
c)
on land.
d)
underground.
|
|
Sudhir Mehta answered |
Aerial animals spend most of their time in air.
State whether the following statement is True or False: Cockroaches pass through four stages in their life cycle.- a)True
- b)False
Correct answer is option 'B'. Can you explain this answer?
State whether the following statement is True or False: Cockroaches pass through four stages in their life cycle.
a)
True
b)
False
|
Subhankar Jain answered |
Understanding Cockroach Life Cycle
Cockroaches do not pass through four stages in their life cycle; instead, they undergo three distinct stages. The correct answer to the statement is indeed "False."
Key Stages in Cockroach Life Cycle
- Egg Stage:
Cockroaches begin their life as eggs. The female lays eggs in a protective casing called an ootheca, which can contain multiple eggs.
- Nymph Stage:
Once the eggs hatch, the young cockroaches emerge as nymphs. Nymphs resemble smaller versions of adult cockroaches but lack wings and are not fully developed. They go through several molts as they grow.
- Adult Stage:
After the nymphs molt several times, they reach the adult stage. At this point, they develop wings and reproductive capabilities.
Additional Information
- Molting:
The nymphs molt multiple times, shedding their exoskeleton to grow. This process is crucial for their development into adults.
- Lifespan and Reproduction:
Adult cockroaches can live for several months and are known for their ability to reproduce quickly, contributing to their population growth.
In summary, cockroaches have a life cycle comprising three stages: egg, nymph, and adult. Understanding these stages helps in managing and controlling cockroach populations effectively.
Cockroaches do not pass through four stages in their life cycle; instead, they undergo three distinct stages. The correct answer to the statement is indeed "False."
Key Stages in Cockroach Life Cycle
- Egg Stage:
Cockroaches begin their life as eggs. The female lays eggs in a protective casing called an ootheca, which can contain multiple eggs.
- Nymph Stage:
Once the eggs hatch, the young cockroaches emerge as nymphs. Nymphs resemble smaller versions of adult cockroaches but lack wings and are not fully developed. They go through several molts as they grow.
- Adult Stage:
After the nymphs molt several times, they reach the adult stage. At this point, they develop wings and reproductive capabilities.
Additional Information
- Molting:
The nymphs molt multiple times, shedding their exoskeleton to grow. This process is crucial for their development into adults.
- Lifespan and Reproduction:
Adult cockroaches can live for several months and are known for their ability to reproduce quickly, contributing to their population growth.
In summary, cockroaches have a life cycle comprising three stages: egg, nymph, and adult. Understanding these stages helps in managing and controlling cockroach populations effectively.
What is the purpose of body coverings for animals in their habitats?- a)To help them breathe underwater
- b)To protect them from danger
- c)To help them fly in the sky
- d)To help them stay awake at night
Correct answer is option 'B'. Can you explain this answer?
What is the purpose of body coverings for animals in their habitats?
a)
To help them breathe underwater
b)
To protect them from danger
c)
To help them fly in the sky
d)
To help them stay awake at night
|
Eduskill Classes answered |
Animals have different types of body coverings to protect themselves from danger. For example, some animals have scales, shells, fur, or feathers to keep them safe and comfortable in their habitats. These coverings help animals survive and stay healthy.
What type of animals are zebras and cows?- a)Herbivores
- b)Carnivores
- c)Omnivores
- d)None of the above
Correct answer is option 'A'. Can you explain this answer?
What type of animals are zebras and cows?
a)
Herbivores
b)
Carnivores
c)
Omnivores
d)
None of the above
|
Subset Academy answered |
Zebras and cows are herbivores because they eat plants. Herbivores are animals that only eat plants for their food. They have special teeth for biting and grinding plants. So, zebras and cows are like the plant-eating champions of the animal world!
What is the purpose of camouflage in animals?- a)To help them fly
- b)To protect them from extreme cold
- c)To help them blend in with their surroundings and avoid predators
- d)To attract mates
Correct answer is option 'C'. Can you explain this answer?
a)
To help them fly
b)
To protect them from extreme cold
c)
To help them blend in with their surroundings and avoid predators
d)
To attract mates
|
Jhanvi Das answered |
Purpose of Camouflage in Animals
Camouflage is a crucial survival mechanism for many animals, allowing them to blend into their environments. This adaptation serves several important functions.
Protection from Predators
- Camouflage helps animals avoid detection by predators.
- By blending in with their surroundings, they become less visible, making it harder for predators to spot them.
- For example, a chameleon can change its color to match the leaves it rests on, effectively hiding from birds that might prey on it.
Hunting and Ambush
- Some predators also use camouflage to their advantage.
- Animals like tigers have stripes that help them blend into the dappled light of the forest, allowing them to stalk their prey more effectively.
- This stealth increases their chances of a successful hunt.
Examples of Camouflage
- Many insects, like stick insects, resemble twigs or leaves, making them nearly invisible to both predators and prey.
- Ocean animals such as octopuses can change their color and texture to match the sea floor or coral, providing excellent cover.
Conclusion
In summary, the primary purpose of camouflage in animals is to help them blend in with their surroundings and avoid predators. This adaptation enhances their survival rates and plays a critical role in the balance of ecosystems. Camouflage is not just a defense mechanism; it is also vital for hunting and maintaining the delicate web of life in nature.
Camouflage is a crucial survival mechanism for many animals, allowing them to blend into their environments. This adaptation serves several important functions.
Protection from Predators
- Camouflage helps animals avoid detection by predators.
- By blending in with their surroundings, they become less visible, making it harder for predators to spot them.
- For example, a chameleon can change its color to match the leaves it rests on, effectively hiding from birds that might prey on it.
Hunting and Ambush
- Some predators also use camouflage to their advantage.
- Animals like tigers have stripes that help them blend into the dappled light of the forest, allowing them to stalk their prey more effectively.
- This stealth increases their chances of a successful hunt.
Examples of Camouflage
- Many insects, like stick insects, resemble twigs or leaves, making them nearly invisible to both predators and prey.
- Ocean animals such as octopuses can change their color and texture to match the sea floor or coral, providing excellent cover.
Conclusion
In summary, the primary purpose of camouflage in animals is to help them blend in with their surroundings and avoid predators. This adaptation enhances their survival rates and plays a critical role in the balance of ecosystems. Camouflage is not just a defense mechanism; it is also vital for hunting and maintaining the delicate web of life in nature.
Which of the following animals has hind limbs longer than the forelimbs?- a)Frog
- b)Fish
- c)Goat
- d)Elephant
Correct answer is option 'A'. Can you explain this answer?
Which of the following animals has hind limbs longer than the forelimbs?
a)
Frog
b)
Fish
c)
Goat
d)
Elephant
|
|
Sudhir Mehta answered |
A frog has longer hind limbs than the fore limbs.
What feature do rodents use to gnaw on their food?- a)Hooked beak
- b)Sharp front teeth
- c)Long trunk
- d)Proboscis
Correct answer is option 'B'. Can you explain this answer?
a)
Hooked beak
b)
Sharp front teeth
c)
Long trunk
d)
Proboscis
|
Rahul Kumar answered |
Rodents, such as rats and squirrels, have sharp front teeth that they use to gnaw on their food. This adaptation helps them eat a variety of foods, including hard items like nuts.
The food is already partly digested when it enters the _______.
- a)Liver
- b)Kidney
- c)small intestine
- d)large intestine
Correct answer is option 'C'. Can you explain this answer?
The food is already partly digested when it enters the _______.
a)
Liver
b)
Kidney
c)
small intestine
d)
large intestine
|
|
Mohit Desai answered |
Small Intestine:
The food is partly digested when it enters the small intestine.
Explanation:
- The small intestine is a long, coiled tube where the majority of digestion and nutrient absorption takes place in the digestive system.
- By the time food reaches the small intestine, it has been broken down into smaller particles in the stomach.
- Enzymes from the pancreas and bile from the liver further break down the food in the small intestine.
- The walls of the small intestine are lined with tiny finger-like projections called villi, which increase the surface area for absorption of nutrients.
- Nutrients from the partly digested food are absorbed into the bloodstream through the walls of the small intestine and transported to cells throughout the body for energy and growth.
In conclusion, the small intestine plays a crucial role in the digestion process by further breaking down food particles and absorbing nutrients into the bloodstream.
The food is partly digested when it enters the small intestine.
Explanation:
- The small intestine is a long, coiled tube where the majority of digestion and nutrient absorption takes place in the digestive system.
- By the time food reaches the small intestine, it has been broken down into smaller particles in the stomach.
- Enzymes from the pancreas and bile from the liver further break down the food in the small intestine.
- The walls of the small intestine are lined with tiny finger-like projections called villi, which increase the surface area for absorption of nutrients.
- Nutrients from the partly digested food are absorbed into the bloodstream through the walls of the small intestine and transported to cells throughout the body for energy and growth.
In conclusion, the small intestine plays a crucial role in the digestion process by further breaking down food particles and absorbing nutrients into the bloodstream.
The feet of frogs and ducks are webbed. This adaptation helps them in- a)holding branches tightly.
- b)swimming in water.
- c)flying in the air.
- d)grabbing and eating insects.
Correct answer is option 'B'. Can you explain this answer?
The feet of frogs and ducks are webbed. This adaptation helps them in
a)
holding branches tightly.
b)
swimming in water.
c)
flying in the air.
d)
grabbing and eating insects.
|
|
Sudhir Mehta answered |
Webbed feet helps aquatic birds like the duck in swimming.
Where does the digestion of food end?- a)In the stomach
- b)In the mouth
- c)In the small intestine
- d)In the large intestine
Correct answer is option 'C'. Can you explain this answer?
a)
In the stomach
b)
In the mouth
c)
In the small intestine
d)
In the large intestine
|
|
Edu Impact answered |
The digestion of food ends in the small intestine. Here, digestive juices from the pancreas and bile from the liver complete the breakdown of food into nutrients, which are then absorbed into the bloodstream.
Animals that live both on land and in water are called_____.- a)Aquatic animals
- b)Amphibians
- c)Arboreal animals
- d)Aerial animals
Correct answer is option 'B'. Can you explain this answer?
Animals that live both on land and in water are called_____.
a)
Aquatic animals
b)
Amphibians
c)
Arboreal animals
d)
Aerial animals
|
Tutorpedia Coaching answered |
Amphibians are animals that can live both on land and in water. They are cold-blooded vertebrates that usually start their life in water and then move to land as they mature.
Which of the following is NOT a viviparous animal?- a)Human beings
- b)Dog
- c)Crocodile
- d)Deer
Correct answer is option 'C'. Can you explain this answer?
a)
Human beings
b)
Dog
c)
Crocodile
d)
Deer
|
Edgy Education answered |
Crocodiles are not viviparous; they lay eggs and are thus classified as oviparous animals. Viviparous animals give birth to live young rather than laying eggs.
What do we call the process by which birds keep their eggs warm until they hatch?- a)Incubation
- b)Gestation
- c)Fertilization
- d)Pollination
Correct answer is option 'A'. Can you explain this answer?
a)
Incubation
b)
Gestation
c)
Fertilization
d)
Pollination
|
|
Learning Education answered |
The process of keeping eggs warm until they hatch is called incubation. During this period, the embryo inside the egg develops and eventually hatches into a chick.
State whether the following statement is True or FalseScales on the skin of animals like lizards, chameleons, and snakes protect them from drying.- a)True
- b)False
Correct answer is option 'A'. Can you explain this answer?
State whether the following statement is True or False
Scales on the skin of animals like lizards, chameleons, and snakes protect them from drying.
a)
True
b)
False
|
|
Raghavendra sekhar answered |
Understanding the Role of Scales in Reptiles
Reptiles like lizards, chameleons, and snakes possess scales that serve multiple important functions, primarily protection against environmental factors.
Protection from Drying Out
- Scales are made of a tough, keratinized material that forms a barrier against water loss.
- This adaptation is crucial for reptiles, as they often inhabit warm, dry environments where moisture can be scarce.
Additional Functions of Scales
- Physical Protection: Scales safeguard reptiles from physical injuries, such as abrasions or attacks from predators.
- Thermoregulation: Scales help in regulating body temperature by reflecting sunlight and reducing heat absorption.
- Camouflage: Many reptiles have scales that blend into their surroundings, aiding in hiding from predators and hunting prey.
Conclusion
The presence of scales is a vital evolutionary adaptation that not only protects reptiles from drying out but also offers various other benefits that enhance their survival in diverse environments. Thus, the statement is indeed true: scales on the skin of animals like lizards, chameleons, and snakes protect them from drying out.
Reptiles like lizards, chameleons, and snakes possess scales that serve multiple important functions, primarily protection against environmental factors.
Protection from Drying Out
- Scales are made of a tough, keratinized material that forms a barrier against water loss.
- This adaptation is crucial for reptiles, as they often inhabit warm, dry environments where moisture can be scarce.
Additional Functions of Scales
- Physical Protection: Scales safeguard reptiles from physical injuries, such as abrasions or attacks from predators.
- Thermoregulation: Scales help in regulating body temperature by reflecting sunlight and reducing heat absorption.
- Camouflage: Many reptiles have scales that blend into their surroundings, aiding in hiding from predators and hunting prey.
Conclusion
The presence of scales is a vital evolutionary adaptation that not only protects reptiles from drying out but also offers various other benefits that enhance their survival in diverse environments. Thus, the statement is indeed true: scales on the skin of animals like lizards, chameleons, and snakes protect them from drying out.
Which of the following animals is an example of an arboreal animal?- a)Elephant
- b)Fish
- c)Squirrel
- d)Bird
Correct answer is option 'C'. Can you explain this answer?
a)
Elephant
b)
Fish
c)
Squirrel
d)
Bird
|
|
Riya Singh answered |
Squirrels are arboreal animals, meaning they mostly live on trees. They have adaptations that help them climb and move through trees.
Grass-hopper protects itself from being eaten by its predator -- a)By Its tastes bad
- b)It can hop away quickly
- c)It can camouflage itself in the grass
- d)It has a poisonous sting
Correct answer is option 'C'. Can you explain this answer?
Grass-hopper protects itself from being eaten by its predator -
a)
By Its tastes bad
b)
It can hop away quickly
c)
It can camouflage itself in the grass
d)
It has a poisonous sting
|
|
Tejas Jain answered |
**Explanation:**
Grasshoppers have various adaptations that help them protect themselves from being eaten by their predators. One of the effective ways a grasshopper protects itself is by camouflaging itself in the grass.
**Camouflage in the Grass:**
- Grasshoppers have evolved to have body colors that blend in with their surroundings, particularly the grass they inhabit.
- Their bodies are usually green or brown, allowing them to camouflage effectively in the grass and vegetation.
- When a grasshopper remains still in the grass, it becomes difficult for predators to spot them due to their similarity in color and texture with the surroundings.
- This adaptation helps grasshoppers avoid being detected by their predators, such as birds, reptiles, and other insect-eating animals.
**Advantages of Camouflage:**
- Camouflage enables grasshoppers to remain hidden from predators, increasing their chances of survival.
- It provides them with a means of defense without having to rely solely on speed or physical traits.
- By blending into the grass, grasshoppers can effectively avoid being detected, giving them more time to find shelter or escape if necessary.
- This adaptation also allows grasshoppers to ambush their prey, as they can remain hidden until the right moment to strike.
**Other Adaptations:**
While camouflage is a significant adaptation for grasshoppers, it is not the only defense mechanism they possess. Grasshoppers also have other adaptations that help protect them:
- Their ability to hop away quickly (option B) allows them to escape from predators that may have spotted them despite their camouflage.
- Some grasshopper species have glands that produce distasteful or toxic substances, making them unappealing or harmful to predators (option A).
- However, the correct answer to the given question is option C because camouflage is the primary defense mechanism used by grasshoppers to protect themselves from being eaten by their predators.
In conclusion, grasshoppers have evolved the ability to camouflage themselves in the grass, which helps them avoid being eaten by predators. This adaptation is crucial for their survival and increases their chances of escaping detection and predation.
Grasshoppers have various adaptations that help them protect themselves from being eaten by their predators. One of the effective ways a grasshopper protects itself is by camouflaging itself in the grass.
**Camouflage in the Grass:**
- Grasshoppers have evolved to have body colors that blend in with their surroundings, particularly the grass they inhabit.
- Their bodies are usually green or brown, allowing them to camouflage effectively in the grass and vegetation.
- When a grasshopper remains still in the grass, it becomes difficult for predators to spot them due to their similarity in color and texture with the surroundings.
- This adaptation helps grasshoppers avoid being detected by their predators, such as birds, reptiles, and other insect-eating animals.
**Advantages of Camouflage:**
- Camouflage enables grasshoppers to remain hidden from predators, increasing their chances of survival.
- It provides them with a means of defense without having to rely solely on speed or physical traits.
- By blending into the grass, grasshoppers can effectively avoid being detected, giving them more time to find shelter or escape if necessary.
- This adaptation also allows grasshoppers to ambush their prey, as they can remain hidden until the right moment to strike.
**Other Adaptations:**
While camouflage is a significant adaptation for grasshoppers, it is not the only defense mechanism they possess. Grasshoppers also have other adaptations that help protect them:
- Their ability to hop away quickly (option B) allows them to escape from predators that may have spotted them despite their camouflage.
- Some grasshopper species have glands that produce distasteful or toxic substances, making them unappealing or harmful to predators (option A).
- However, the correct answer to the given question is option C because camouflage is the primary defense mechanism used by grasshoppers to protect themselves from being eaten by their predators.
In conclusion, grasshoppers have evolved the ability to camouflage themselves in the grass, which helps them avoid being eaten by predators. This adaptation is crucial for their survival and increases their chances of escaping detection and predation.
The scaly skin of snakes- a)protects them from their enemies.
- b)scares human beings.
- c)makes them beautiful.
- d)helps them crawl and protects them from drying.
Correct answer is option 'D'. Can you explain this answer?
The scaly skin of snakes
a)
protects them from their enemies.
b)
scares human beings.
c)
makes them beautiful.
d)
helps them crawl and protects them from drying.
|
|
Sudhir Mehta answered |
The scaly skin of snakes helps them in crawling and protect the skin drying.
What is an adaptation?- a)A change in an animal's body or behavior to help it survive
- b)A type of food animals eat in their habitats
- c)A place where animals live and play
- d)A special feature animals have to look beautiful
Correct answer is option 'A'. Can you explain this answer?
What is an adaptation?
a)
A change in an animal's body or behavior to help it survive
b)
A type of food animals eat in their habitats
c)
A place where animals live and play
d)
A special feature animals have to look beautiful
|
|
Eduskill Classes answered |
- An adaptation is like when an animal changes something about itself, like how it looks or acts, to help it live better in its home.
- For example, polar bears have thick fur to stay warm in cold places.
- So, when animals make these changes to stay safe and healthy in their habitats, we call it an adaptation.
Birds such as hen, pigeon, sparrow, crow, parrot, duck, and ostrich lay their young in hard-shelled _____ which hatch after some time.- a)Shells
- b)Nests
- c)Eggs
- d)Feathers
Correct answer is option 'C'. Can you explain this answer?
Birds such as hen, pigeon, sparrow, crow, parrot, duck, and ostrich lay their young in hard-shelled _____ which hatch after some time.
a)
Shells
b)
Nests
c)
Eggs
d)
Feathers
|
|
Eduskill Classes answered |
Birds like hens and pigeons lay their young in hard-shelled eggs. These eggs hatch after some time, and the adult birds sit on them to keep them warm until they hatch. This process is called incubation.
What adaptation helps a cactus survive in a dry desert?- a)Long roots that reach deep water
- b)Thick, waxy skin
- c)Brightly colored flowers
- d)Both (A) and (C)
Correct answer is option 'B'. Can you explain this answer?
What adaptation helps a cactus survive in a dry desert?
a)
Long roots that reach deep water
b)
Thick, waxy skin
c)
Brightly colored flowers
d)
Both (A) and (C)
|
|
Subset Academy answered |
Cacti have a thick, waxy skin that minimizes water loss, an essential adaptation for survival in arid desert environments.
This waxy layer helps to reduce evaporation, allowing the cactus to retain moisture for longer periods, which is crucial given the scarce water availability in deserts.
While other adaptations, like deep roots, are beneficial, the thick, waxy skin is a primary feature directly related to conserving water.
This waxy layer helps to reduce evaporation, allowing the cactus to retain moisture for longer periods, which is crucial given the scarce water availability in deserts.
While other adaptations, like deep roots, are beneficial, the thick, waxy skin is a primary feature directly related to conserving water.
At what age do children typically start losing their milk teeth and getting permanent teeth?- a)Around 2 years
- b)Around 4 years
- c)Around 6 years
- d)Around 10 years
Correct answer is option 'C'. Can you explain this answer?
a)
Around 2 years
b)
Around 4 years
c)
Around 6 years
d)
Around 10 years
|
|
Sounak Kulkarni answered |
Introduction
Children typically start losing their milk teeth and getting their permanent teeth around the age of 6. This process is a natural part of dental development.
Why Around Age 6?
- Dental Development Timeline: By age 6, most children have a full set of 20 milk teeth. As their jaws grow and develop, these teeth will begin to loosen.
- Emergence of Permanent Teeth: The first set of permanent molars, often called "6-year molars," usually erupts behind the milk teeth at this age. This is a crucial time for dental transition.
Signs of Losing Milk Teeth
- Mobility: Children may notice that their milk teeth feel wobbly. This is the first sign that a tooth is ready to fall out.
- Gum Sensitivity: Some children may experience slight discomfort or sensitivity in their gums, indicating that a new tooth is pushing through.
Importance of This Transition
- Space for Permanent Teeth: Losing milk teeth creates space for larger, permanent teeth, which are essential for proper chewing and alignment.
- Oral Health Awareness: This transitional phase offers an opportunity for parents to teach children about oral hygiene, emphasizing the importance of brushing and flossing.
Conclusion
In summary, the transition from milk teeth to permanent teeth typically begins around age 6, marking a significant milestone in a child's dental health journey. Encouraging good oral hygiene practices during this time is essential for maintaining healthy teeth for life.
Children typically start losing their milk teeth and getting their permanent teeth around the age of 6. This process is a natural part of dental development.
Why Around Age 6?
- Dental Development Timeline: By age 6, most children have a full set of 20 milk teeth. As their jaws grow and develop, these teeth will begin to loosen.
- Emergence of Permanent Teeth: The first set of permanent molars, often called "6-year molars," usually erupts behind the milk teeth at this age. This is a crucial time for dental transition.
Signs of Losing Milk Teeth
- Mobility: Children may notice that their milk teeth feel wobbly. This is the first sign that a tooth is ready to fall out.
- Gum Sensitivity: Some children may experience slight discomfort or sensitivity in their gums, indicating that a new tooth is pushing through.
Importance of This Transition
- Space for Permanent Teeth: Losing milk teeth creates space for larger, permanent teeth, which are essential for proper chewing and alignment.
- Oral Health Awareness: This transitional phase offers an opportunity for parents to teach children about oral hygiene, emphasizing the importance of brushing and flossing.
Conclusion
In summary, the transition from milk teeth to permanent teeth typically begins around age 6, marking a significant milestone in a child's dental health journey. Encouraging good oral hygiene practices during this time is essential for maintaining healthy teeth for life.
What adaptive feature helps elephants to stay cool in hot environments?- a)Their long trunk
- b)Their big ears
- c)Their thick skin
- d)Their strong legs
Correct answer is option 'B'. Can you explain this answer?
a)
Their long trunk
b)
Their big ears
c)
Their thick skin
d)
Their strong legs
|
|
Riya Singh answered |
Elephants' big ears help them to stay cool by radiating heat away from their body. The large surface area of their ears allows for better heat dissipation.
Which of the following is the purpose of migration in animals?- a)To escape from harsh weather
- b)To search food
- c)To reach their breeding grounds
- d)All of these
Correct answer is option 'D'. Can you explain this answer?
Which of the following is the purpose of migration in animals?
a)
To escape from harsh weather
b)
To search food
c)
To reach their breeding grounds
d)
All of these
|
|
Ankita Bajaj answered |
Purpose of Migration in Animals
Migration is a natural phenomenon observed in many animal species. It is a seasonal movement of animals from one place to another. Let's understand the purpose of migration in animals through the following points:
To Escape from Harsh Weather
- During the winter season, the temperature drops drastically in many regions. This makes it difficult for animals to survive in those areas. Hence, they migrate to warmer regions to escape from the harsh weather conditions. Similarly, during summers, some animals migrate to cooler regions to avoid excessive heat.
To Search Food
- Food availability is another reason for migration. Some animals migrate to places where food is abundant. For example, birds migrate to regions where insects are present in large numbers. Similarly, herbivores migrate to regions where there is plenty of vegetation for grazing.
To Reach their Breeding Grounds
- Many animals migrate to their breeding grounds to mate and lay eggs. For example, sea turtles migrate to the beaches where they were born to lay eggs. Similarly, salmon fish migrate to shallow waters to lay eggs.
Conclusion
Migration is an essential survival strategy for many animals. It helps them to escape from harsh weather conditions, search for food and reach their breeding grounds. By understanding the purpose of migration, we can protect and conserve the species that undertake this journey every year.
Migration is a natural phenomenon observed in many animal species. It is a seasonal movement of animals from one place to another. Let's understand the purpose of migration in animals through the following points:
To Escape from Harsh Weather
- During the winter season, the temperature drops drastically in many regions. This makes it difficult for animals to survive in those areas. Hence, they migrate to warmer regions to escape from the harsh weather conditions. Similarly, during summers, some animals migrate to cooler regions to avoid excessive heat.
To Search Food
- Food availability is another reason for migration. Some animals migrate to places where food is abundant. For example, birds migrate to regions where insects are present in large numbers. Similarly, herbivores migrate to regions where there is plenty of vegetation for grazing.
To Reach their Breeding Grounds
- Many animals migrate to their breeding grounds to mate and lay eggs. For example, sea turtles migrate to the beaches where they were born to lay eggs. Similarly, salmon fish migrate to shallow waters to lay eggs.
Conclusion
Migration is an essential survival strategy for many animals. It helps them to escape from harsh weather conditions, search for food and reach their breeding grounds. By understanding the purpose of migration, we can protect and conserve the species that undertake this journey every year.
Which two substances are added to the food in the small intestine to aid digestion?- a)Saliva and hydrochloric acid
- b)Bile and pancreatic juice
- c)Enzymes and water
- d)Fiber and vitamins
Correct answer is option 'B'. Can you explain this answer?
a)
Saliva and hydrochloric acid
b)
Bile and pancreatic juice
c)
Enzymes and water
d)
Fiber and vitamins
|
|
Riya Singh answered |
In the small intestine, bile from the liver and pancreatic juice from the pancreas are added to the food. These substances help digest the food completely by breaking down fats, proteins, and carbohydrates into absorbable nutrients.
Which term refers to the life stages of an animal from an embryo to a mature adult?- a)Incubation
- b)Metamorphosis
- c)Life cycle
- d)Developmental stages
Correct answer is option 'C'. Can you explain this answer?
a)
Incubation
b)
Metamorphosis
c)
Life cycle
d)
Developmental stages
|
|
Riya Singh answered |
The series of stages from an embryo to a mature adult in an animal's life is referred to as the life cycle. This includes stages such as incubation, hatching, and growth to adulthood.
How does the food pipe (oesophagus) facilitate the movement of food from the mouth to the stomach, and what mechanism aids this process?- a)Through gravity alone
- b)By enzyme action in the food pipe
- c)By peristalsis, a series of muscle contractions
- d)By absorbing nutrients during the journey
Correct answer is option 'C'. Can you explain this answer?
a)
Through gravity alone
b)
By enzyme action in the food pipe
c)
By peristalsis, a series of muscle contractions
d)
By absorbing nutrients during the journey
|
|
Abhijeet Mukherjee answered |
Peristalsis in the Food Pipe (Oesophagus)
Peristalsis is the mechanism that aids in the movement of food from the mouth to the stomach through the food pipe (oesophagus). This process involves a series of muscle contractions that help push the food bolus downwards towards the stomach.
How Peristalsis Works
- When we swallow food, it enters the oesophagus through the throat.
- The muscles in the walls of the oesophagus contract and relax in a coordinated manner to create a wave-like motion.
- This wave-like motion, known as peristalsis, propels the food bolus downwards towards the stomach.
- The muscles behind the food bolus contract to push it forward, while the muscles ahead of the bolus relax to allow for its passage.
Role of Gravity
While gravity can assist in the movement of food from the mouth to the oesophagus, peristalsis is the primary mechanism responsible for this process. Gravity alone may not be sufficient to move the food bolus efficiently through the oesophagus, especially when eating in different positions or when lying down.
Conclusion
In conclusion, peristalsis is the key mechanism that facilitates the movement of food from the mouth to the stomach through the food pipe (oesophagus). This coordinated muscle contraction and relaxation ensure that food is transported efficiently and effectively for digestion and absorption of nutrients.
Peristalsis is the mechanism that aids in the movement of food from the mouth to the stomach through the food pipe (oesophagus). This process involves a series of muscle contractions that help push the food bolus downwards towards the stomach.
How Peristalsis Works
- When we swallow food, it enters the oesophagus through the throat.
- The muscles in the walls of the oesophagus contract and relax in a coordinated manner to create a wave-like motion.
- This wave-like motion, known as peristalsis, propels the food bolus downwards towards the stomach.
- The muscles behind the food bolus contract to push it forward, while the muscles ahead of the bolus relax to allow for its passage.
Role of Gravity
While gravity can assist in the movement of food from the mouth to the oesophagus, peristalsis is the primary mechanism responsible for this process. Gravity alone may not be sufficient to move the food bolus efficiently through the oesophagus, especially when eating in different positions or when lying down.
Conclusion
In conclusion, peristalsis is the key mechanism that facilitates the movement of food from the mouth to the stomach through the food pipe (oesophagus). This coordinated muscle contraction and relaxation ensure that food is transported efficiently and effectively for digestion and absorption of nutrients.
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