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प्रश्न
Fill in the blank.
The backbone of vertebrates is made up of a number of small bones called .....................
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उत्तर
The backbone of vertebrates is made up of a number of small bones called vertebrae.
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संबंधित प्रश्न
Tick (✓) the appropriate answer:
The unicellular organism causing malaria
Fill in the blank.
Some .....................have two pairs of legs per segment.
Fill in the blank.
A ................. has an external coiled shell.
Select the most appropriate answer.
Organs of excretion in annelids are
Answer in detail.
Name the different classes of arthropods. Write one characteristic feature of each class.
Given below are groups of animals, and their characteristics features. Some of the features are incorrect. Identify the odd one out in each.
| Group | Characteristic features | Odd one out |
| Porifera | porous animals, have tentacles, fixed to surface | |
| Amphibia | cold-blooded, lungs in adults, scaly skin | |
| Aves | cold-blooded, wings, feathers, bones with large air spaces | |
| Pisces | live in water, scaly skin warm-blooded, fins for swimming |
Name the various classes of chordates with two examples.
Which group of animals have following characteristics: Body soft, covered by mantle and a calcareous shell.
Write a note on mammals.
On the basis of the position of the notochord, classify the different prochordates. Justify your answer.
