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प्रश्न
Answer in detail.
List two notable characteristic of birds which is not found in any other group of animals?
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उत्तर
The most notable characteristic of birds that are not found in any other group of animals is the presence of feathers. They are the only animals on earth that have a backbone as well as feathers that cover their entire body.
Also, their skeleton is light as their bones have air cavities and are hollow. They also have beaks with no teeth.
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संबंधित प्रश्न
Give names of two animals which are found as parasites inside the human intestine.
Write the characteristics of class Aves with reference to their body covering and jaws.
Fill in the blank.
The animals without a backbone whose body is soft and often covered by a hard shell are .................
Differentiate between
radially symmetrical and bilaterally symmetrical body
Find the odd one out. Give reason.
ant, cockroach, spider, dragonfly
Answer in detail.
You are asked to classify an animal in the correct group. The animal has a soft body and arm-like tentacles. You dissect the animal and find that it has an internal shell. Is the animal a cnidarian or a mollusc? Explain your answer.
Classify the given animals into different categories indicated.
Jellyfish, liver fluke, pinworm, Ascaris, tapeworm, Hydra, sea anemone into cnidarians, Platyhelminthes, and Nemathelminthes.
Given below is an animal followed by three terms or features. Underline the term which does not match with the animal.
Pigeon - Feathers, wings, hair
Match items in Column A with the appropriate items in Column B
| Column A | Column B |
| Cobra | Protozoa |
| Peacock | Amphibia |
| Earthworm | Annelida |
| Euglena | Reptilia |
| Frog | Porifera |
| Spongilla | Aves |
Assertion (A): Mammals give birth to their young ones.
Reason (R): Platypus is an egg-laying mammal.
