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All questions of Life Cycle of Plants for Grade 2 Exam

How do pet animals like dogs and cats benefit humans?
  • a)
    By providing companionship and emotional support
  • b)
    By serving as sources of food and other products
  • c)
    By helping with agricultural work and transportation
  • d)
    By controlling pests and weeds in households
Correct answer is option 'A'. Can you explain this answer?

Amrita Pillai answered
Companionship and Emotional Support
Pet animals like dogs and cats play a vital role in providing companionship and emotional support to humans. Here are some key points to explain this benefit:
1. Companionship
- Pets are often referred to as "man's best friend." Their presence can reduce feelings of loneliness and isolation.
- They offer unconditional love and loyalty, creating a strong bond with their owners.
- Having a pet encourages social interaction, as pet owners often connect with other pet enthusiasts.
2. Emotional Support
- Pets can help reduce stress, anxiety, and depression. Their playful nature and affectionate behavior can uplift moods.
- The act of petting or cuddling a pet releases oxytocin, a hormone that promotes bonding and emotional well-being.
- Pets provide a sense of purpose and responsibility, especially for individuals who may feel lost or disconnected.
3. Physical Health Benefits
- The companionship of pets can lead to increased physical activity, as dogs, for example, require regular walks.
- Engaging with pets can lower blood pressure and improve heart health by reducing stress levels.
4. Teaching Empathy and Responsibility
- Caring for a pet teaches children empathy and responsibility. They learn to nurture and respect another being’s needs.
- This can lead to better social skills and emotional intelligence.
In summary, the companionship and emotional support provided by dogs and cats significantly enhance human well-being, making them invaluable members of many households.

What is the primary diet of animals like lions, tigers, and leopards?
  • a)
    Plants
  • b)
    Insects
  • c)
    Other animals
  • d)
    Fish
Correct answer is option 'C'. Can you explain this answer?

Janani Desai answered
Introduction
Lions, tigers, and leopards are carnivorous animals, meaning their primary diet consists of other animals. This dietary choice is fundamental to their survival and ecological role.
Dietary Habits
- Carnivorous Nature: These big cats are classified as carnivores, which means they primarily hunt and consume meat.
- Hunting Skills: They have evolved to be skilled hunters, utilizing strength, stealth, and speed to catch their prey.
Types of Prey
- Large Herbivores: Lions often hunt large animals such as zebras, wildebeests, and buffaloes. They hunt in groups (prides), which increases their success rate.
- Smaller Mammals: Tigers and leopards tend to hunt smaller mammals like deer, antelope, and sometimes even birds or small reptiles, depending on their habitat.
Ecological Role
- Predator-Prey Balance: As apex predators, they help maintain the balance in ecosystems by controlling the population of herbivores, which in turn affects vegetation growth and overall habitat health.
- Nutrient Cycling: The remains of their prey contribute to nutrient cycling within the ecosystem, enriching the soil and supporting other life forms.
Conclusion
The primary diet of lions, tigers, and leopards consists of other animals. This carnivorous diet is not only essential for their survival but also plays a critical role in maintaining the ecological balance in their habitats.

Which animals are commonly used for transportation and carrying heavy loads?
  • a)
    Dogs and cats
  • b)
    Horses and camels
  • c)
    Elephants and monkeys
  • d)
    Lions and tigers
Correct answer is option 'B'. Can you explain this answer?

Nisha Kumar answered
Transportation Animals
When it comes to animals used for transportation and carrying heavy loads, certain species stand out due to their strength, endurance, and ability to adapt to various environments.
Horses
- Horses have been used for centuries in various cultures around the world.
- They are strong and can carry heavy loads over long distances.
- Horses are also fast and can travel quickly, making them ideal for both transportation and work.
Camels
- Camels are often referred to as "ships of the desert" because they can travel long distances in arid climates.
- They are specifically adapted to handle extreme temperatures and can go for days without water.
- Camels can carry substantial weights, making them vital for trade routes, especially in desert regions.
Why Not Other Options?
- Dogs and Cats: While dogs can carry small loads and assist in transportation (like sled dogs), they are not commonly used for heavy lifting. Cats, on the other hand, are primarily pets and do not serve transportation purposes.
- Elephants: Although elephants are indeed strong and have been used for heavy lifting in some cultures, they are not as widely used for transportation as horses and camels.
- Monkeys, Lions, and Tigers: These animals are primarily wild and not domesticated for transportation. They do not have the physical capabilities or temperament suitable for carrying heavy loads.
In summary, horses and camels are the primary animals used for transportation and carrying heavy loads due to their strength, adaptability, and historical significance in human societies.

Where do we commonly find wild animals like crocodiles and frogs?
  • a)
    In deserts
  • b)
    In forests
  • c)
    In oceans
  • d)
    In mountains
Correct answer is option 'B'. Can you explain this answer?

Shounak Ghosh answered
Wild Animals like Crocodiles and Frogs in Forests
Crocodiles and frogs are commonly found in forests due to various reasons:
  • Habitat: Forests provide a suitable habitat for crocodiles and frogs as they offer a combination of water bodies like rivers, lakes, and swamps where these animals can thrive.
  • Food Availability: Forests are rich in biodiversity, providing a wide range of prey for crocodiles and frogs to feed on, such as fish, insects, and small mammals.
  • Protection: Forests offer ample hiding spots and cover for these animals to protect themselves from predators and harsh weather conditions.
  • Water Sources: Crocodiles and frogs require access to water for breeding, feeding, and hydration, which makes forests with water bodies an ideal habitat for them.
  • Biodiversity: Forests support a diverse ecosystem, allowing crocodiles and frogs to coexist with other species and maintain a balanced food chain.


In conclusion, forests provide the necessary resources and environment for wild animals like crocodiles and frogs to thrive, making them commonly found in these habitats.

Turnip is a ____.
  • a)
    fruit that we eat.
  • b)
    root that we eat.
  • c)
    seed that we eat.
  • d)
    leaf that we eat.
Correct answer is option 'B'. Can you explain this answer?

Aman Banerjee answered
Introduction:
In this question, the correct answer is option 'B', which states that turnip is a leaf that we eat. Let's explore this answer in detail.

Explanation:
1. What is a turnip?
A turnip is a root vegetable that belongs to the Brassicaceae family. It is scientifically known as Brassica rapa subsp. rapa. Turnips are widely cultivated for their edible roots, which are typically round and bulbous in shape.

2. Turnip as a leaf:
While turnips are primarily known for their root, their leaves are also edible and commonly consumed. The young, tender leaves of turnip plants are often harvested and used as leafy greens. These leaves are rich in nutrients and have a slightly bitter taste.

3. Nutritional value of turnip leaves:
Turnip leaves are highly nutritious and provide several health benefits. They are a good source of vitamins A, C, and K, as well as minerals like calcium, iron, and potassium. These leaves are also low in calories and high in dietary fiber.

4. Culinary uses of turnip leaves:
Turnip leaves can be cooked and consumed in various ways. They can be sautéed, stir-fried, steamed, or added to soups and stews. The leaves have a slightly peppery flavor, which adds a unique taste to dishes. Additionally, they can be used as a substitute for other leafy greens like spinach or kale in recipes.

5. Health benefits of turnip leaves:
Consuming turnip leaves offers several health benefits. The high vitamin content in these leaves helps boost the immune system, promote healthy vision, and strengthen bones. The presence of dietary fiber aids digestion and supports a healthy digestive system. Turnip leaves are also known for their antioxidant properties, which can help protect against chronic diseases.

Conclusion:
In conclusion, while turnips are primarily known for their edible roots, their leaves are also a valuable part of the plant. Turnip leaves are nutritious, versatile, and can be enjoyed in various culinary preparations. Therefore, option 'B' stating that turnip is a leaf that we eat is the correct answer.

What is the living place of a lion known as?
  • a)
    Den
  • b)
    Nest
  • c)
    Cave
  • d)
    Burrow
Correct answer is option 'A'. Can you explain this answer?

Gauri Pillai answered
Understanding Lion Habitats
Lions are majestic creatures known for their social behavior and strong family bonds. Unlike many other big cats, lions live in groups called prides, which significantly influences their choice of habitat.
Where Lions Reside
- Den: This is the correct answer. Lions typically use dens for resting and raising their cubs. Dens are often found in thick vegetation or caves, providing safety from predators and harsh weather. Lionesses usually choose a secluded spot to give birth and care for their young until they are strong enough to join the pride.
- Nest: This term is more commonly associated with birds and some mammals that build nests for laying eggs or resting. Lions do not build nests; they prefer to find natural shelters.
- Cave: While lions may occasionally take shelter in caves, they do not exclusively reside there. Caves are not their primary habitat, but they can serve as temporary resting places.
- Burrow: This term refers to a hole or tunnel dug by certain animals, primarily rodents. Lions do not dig or use burrows for living; they prefer open areas with some cover.
Conclusion
In summary, the correct place where a lion typically resides is a "den." This choice provides safety for their young and a comfortable space for the pride. Understanding their habitat helps us appreciate the importance of conservation efforts to protect these magnificent animals and their environments.

What is the role of hyenas, jackals, and vultures in the ecosystem?
  • a)
    They hunt other animals.
  • b)
    They primarily eat plants.
  • c)
    They eat the remains of dead animals, keeping the environment clean.
  • d)
    They eat insects and small mammals.
Correct answer is option 'C'. Can you explain this answer?

Arjun Sharma answered
Role of Hyenas, Jackals, and Vultures in the Ecosystem
Hyenas, jackals, and vultures play a crucial role in maintaining the balance of the ecosystem by primarily feeding on the remains of dead animals. This scavenging behavior has several important implications for the environment and other organisms.

Hyenas:
- Hyenas are known to scavenge on carcasses left behind by other predators or animals that have died naturally.
- By consuming the remains of dead animals, hyenas help in recycling nutrients back into the ecosystem.
- They also help in preventing the spread of diseases by consuming carrion before it has a chance to decompose and release harmful pathogens.

Jackals:
- Jackals are opportunistic feeders that also scavenge on the remains of dead animals.
- They play a role in cleaning up the environment by removing carcasses that could otherwise attract disease-spreading pests.
- Jackals help in maintaining the health of the ecosystem by preventing the buildup of decaying organic matter.

Vultures:
- Vultures are specialized scavengers that have highly acidic stomachs capable of digesting pathogens present in carrion.
- They are often the first to locate and feed on carcasses, preventing the spread of disease in the environment.
- Vultures contribute to the efficient decomposition of dead animals, which helps in nutrient recycling and maintaining ecosystem health.
In conclusion, hyenas, jackals, and vultures play a critical role in the ecosystem by consuming the remains of dead animals. Their scavenging behavior helps in nutrient recycling, disease prevention, and overall environmental cleanliness.

Which part of plant gives out sweet fragnance to attract butterflies?
  • a)
    Flowers
  • b)
    Leaves
  • c)
    Fruits
  • d)
    All of the above
Correct answer is option 'A'. Can you explain this answer?

Flowers give out sweet smells to attract butterflies. The fragrance helps butterflies find the flowers, so they can drink nectar. The nectar is food for butterflies.

Study the given flow chart and select the correct option that fills the spaces d, e, f, and g:

  • a)
    (i)
  • b)
    (ii)
  • c)
    (iii)
  • d)
    (iv)
Correct answer is option 'A'. Can you explain this answer?

Amit Khanna answered
We eat different parts (stems, roots, leaves, and flowers) of different Plants. Flowers of broccoli, leaves of spinach, underground stems of onion and roots of radish are edible parts of these plants.

What type of plant needs support to grow vertically?
  • a)
    Trees
  • b)
    Shrubs
  • c)
    Herbs
  • d)
    Climbers
Correct answer is option 'D'. Can you explain this answer?

Climbers are plants with weak stems that require support, such as trellises or other plants, to grow vertically.

'X' is a stem that grows above the ground while 'Y' is a stem that grows under the ground. What are 'X' and 'Y'?
  • a)
    (i)
  • b)
    (ii)
  • c)
    (iii)
  • d)
    (iv)
Correct answer is option 'D'. Can you explain this answer?

Amit Khanna answered
Sugarcane is a stem that grows above the ground. Ginger and Potato are stems that grow under the ground. Carrot and radish are roots that grow underground.

Which type of plant has a creeping growth habit?
  • a)
    Trees
  • b)
    Shrubs
  • c)
    Herbs
  • d)
    Creepers
Correct answer is option 'D'. Can you explain this answer?

Creepers are plants with weak stems that crawl along the ground, spreading horizontally instead of growing vertically.

At which of the following time may a plant be preparing food?
  • a)
    6 a.m.
  • b)
    10 a.m.
  • c)
    10 p.m.
  • d)
    Midnight
Correct answer is option 'B'. Can you explain this answer?

Kds Coaching answered
A plant prepares food through photosynthesis, which requires sunlight. This happens during the day, so 10 a.m. is when a plant is actively preparing food.

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