EVS Content (Animal Kingdom) - CTET & State TET MCQ

Concept:

• Man is dependent on plants and animals in various ways and vice versa.

Explanation:

• Birds feed on insects.
• Insects feed on the mango fruit on the mango tree.
• In the absence of birds, the mangoes are ruined by insects.
• If the birds were present, the birds would have eaten the insects and the mangoes would not have become spoilt.

Thus, (A) and (R) both are true and (R) is the correct explanation of (A).

The correct answer is (A) is true but (R) is false.

Key Point

• (A) Earthworm is referred to as a farmer's best friend.
  • This statement is true.
  • Earthworms are considered beneficial for agriculture because they play several crucial roles in soil health and plant growth:
    • Aerating the soil: Earthworms burrow through the soil, creating tunnels that allow air, water, and roots to penetrate deeper.
    • Improving Drainage: These tunnels also improve drainage and prevent waterlogging, which can harm plants.
    • Enriching the soil: Earthworms feed on organic matter and their castings are rich in nutrients like nitrogen, phosphorus, and potassium, which improve soil fertility.
    • Promoting microbial activity: Their activities stimulate the growth of beneficial soil microbes, further contributing to soil health.
• (R) Earthworms destroy the weeds.
  • This statement is false.
  • While earthworms can indirectly affect weed growth by improving soil conditions that favor desirable plants, they do not actively seek out and destroy weeds.
  • They feed on organic matter, which includes decaying plant material, not living plants like weeds.

Therefore, (A) is true but (R) is false.

Concept:

• A bird's home is called a nest.
• A nest is a place where birds lay eggs.
• It acts as a shelter for its young ones.
• Every bird makes its nest in a unique way.

Key Points 

Indian robin:

• It makes its nest on the roadside between stones or grasslands.
• It is covered with twigs, cotton, and wool.

Thus, on the way to Gopalbhai’s house, there are many stones along the roadside. In the space between these stones, a bird has laid its eggs. Bachubhai showed it to Ranu. Ranu looked through the binoculars.  saw that the nest was made of grass. On top, there were soft twigs, roots, wool, hair and cotton wool. It was nest of Indian Robin

Additional Information

Snakes: 

• Snakes can't hear the sounds but respond only by feeling the vibrations through their skin.
• They do not have external ears.
• They only feel the vibrations on the ground.
• Of the many kinds of snakes found in our country, only four types of snakes are poisonous.
• They are Cobra, Common Krait, Russel’s Viper (Duboiya), Saw-scaled Viper (Afai).

Key Points

• A snake has two hollow teeth (fangs).
• When it bites, the poison enters the person's body through the fangs.
• There is a medicine for snake bites.
• The medicine is made from the snake's poison and is available in all government hospitals.
• Snakes are friends of the farmers.
• They eat the rats in the fields, otherwise, rats would eat the crops.

Thus, the poisonous teeth is known as fangs.

Concept:

• Elephants live in groups called herds.
• They are the largest land animals.
• They are herbivores.
• An elephant herd has mainly females and baby elephants.
• The oldest female is the leader of the herd.
• Male elephants live in the herd till they are 14–15 years old. 

Explanation:

• An adult elephant can eat more than 100 kilograms of leaves and twigs in one day.
• They sleep for only two to four hours a day.
• Elephants love to play with mud and water.
• The mud keeps their skin cool.
• Their big ears also work like fans.
• The elephants flap these to keep themselves cool.

​Thus, elephants sleep for 12-14 h a day is incorrect.

Additional Information

•  Weight of an adult elephant: 2000- 4000 kg.
• Elephants are predominantly found in tropical forests of the African and Indian subcontinent.
• The gestatation period of an elephant is 22 months which is the longest for any mammal.

Concept:

• The honeybee is an insect belonging to the genus Apis.
• Honeybees are excellent pollinators.
• They collect nectars from flowers and help in transferring their pollen.
• Honeybees are commercially exploited to extract honey from their hives.

Explanation:

• Because of the many benefits of honey, beekeeping becomes very profitable commercially.
• Many state governments run programs to train young students in beekeeping.
• In the training, the following things can be learned:
  • Types of flowers that attract honeybees: Honeybees are attracted to litchi flowers.
  • The egg-laying pattern of honeybees: Honeybees lay their eggs from October to December.
  • The best time to start beekeeping is October to December.

Thus;

A. Honeybees are attracted to the litchi flowers. Correct

B. Honeybees lay their eggs from January to March. Incorrect

C. October to December is the best time to start beekeeping. Correct

Additional InformationAbout honeybee:

• Honeybees live in colonies with one queen running the whole hive.
• Worker honeybees are all females.
• Worker bees are the only bees most people ever see flying around outside of the hive.
• They forage for food, build honeycombs, and protect the hive.
• Male bees are called drones. 

Concept:

• Birds build nests to lay their eggs and incubate their younger ones.
• Different birds build nests at different places, some on ground level, some high up on the tree.
• Different birds use different techniques and different materials to build their nests.

Key Points Barbet:

• It is a tropical bird constituting the family Capitonidae.
• Barbets are named for the bristles at the bases of their stout, sharp bills.
• They are big-headed, short-tailed birds, 9–30 cm long, greenish or brownish, with splashes of bright colours or white.
• The distribution of the family spans Central America to northern South America; sub-Saharan Africa; and Southeast Asia, eastward only to Borneo and Bali.
• All are non-migratory.
• Barbets sit stolidly in treetops when not feeding on insects, lizards, birds’ eggs, fruit, and berries.
• Some climb like woodpeckers; all fly weakly.
• The nest is a hole, dug with the beak, high up in a rotting tree or in a termite nest.​

​Thus, A bird that makes the nest is a hole, dug with a beak, high up in a rotting tree or in a termite nest is a barbet.
Additional Information

Sunbird:

• They are tiny birds. 
• These are usually seen during dawn.
• They make a tiny nest hanging from the branch of a small tree or shrub.
• Nest is usually made up of:
  • Hair
  • Grass
  • Dry leaves
  • Cloth pieces.

Koyel:

• It is a crow-size bird, with a similar appearance.
• It does not make its own nest.
• Crow makes a nest for it.

Indian robin:

• It makes its nest on the roadside between stones or grasslands.
• It is covered with twigs, cotton, and wool.

Tailorbird:

• It is a small bird with a long tail.
• It makes its nest by switching the two leaves together.

Concept:

• A bird is a warm-blooded vertebrate (animal with a backbone) with the ability to fly.

​Explanation:

• Peacock is a species of resplendent birds of the pheasant family.
• Peacock is a beautiful bird with so many shades of blue from top to tail.
• A crown on the head and coins on the tail add more value to its beauty.
• It is our national bird.
• In 1963, the peacock was declared the national bird of our country due to its involvement in the religious tradition of India.

Thus, a peacock is a bird that has a crown on the head and coins on the tail, and so many shades of blue from top to tail.

Concept:

• Animals can reproduce by
  • either giving birth to new babies or
  • laying eggs from which new babies hatch
• Those that give birth to new babies are called viviparous.
• Those that lay eggs are called oviparous.

Important Points

• Viviparous animals:
  • These animals reproduce by giving birth to younger ones.
  • They have external ears and hairs on their skin.
  • They can regulate their body temperature.
  • They are mostly mammals.
  • Example: elephants, lions, humans.
• Oviparous animals:
  • These animals reproduce by laying eggs from which new babies hatch
  • They do not have external ears and hairs on their skin.
  • They cannot regulate their body temperature.
  • Example: ch icken, duck, insects, crocodiles.

​Explanation:

• Animals that lay eggs do not have external ears.
• Crocodiles have tiny holes on top of their head that act as ears.
• Ears of animals serve the following functions:
  • Helps in hearing
  • Maintaining static and dynamic balance
  • In birds, to maintain balance during flight
  • The ears of elephants help to cool their body.
• Animals that give birth to younger ones have hairs on their body.
• The different patterns on the animals are due to the hair on their skin.

​Thus, 

A. Animals that lay eggs have external ears. Incorrect

B. Those animals who have external ears have hair on their body. Correct

C. Crocodiles have external ears. Incorrect

D. Ears of birds help them maintain balance during flight. Correct

E. The different patterns on the animals are due to the hair on their skin. Correct

The correct answer is cow - 4 hours

Explanation:

List of sleeping hours of animal