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प्रश्न
Differentiate between
insects and crustaceans
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उत्तर
| Insects | Crustaceans | ||
| 1 | Body of insects is divided into three regions-head, thorax and abdomen. | 1 | Head and thorax are fused in crustaceans. |
| 2 | Most of them have three pairs of legs. | 2 | They have many numbers of jointed legs. |
| 3 | Most of them have wings. | 3 | Wings are absent. |
| 4 | e.g. Housefly, butterfly. | 4 | e.g. Crab, lobster. |
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संबंधित प्रश्न
Fill in the blank.
The backbone of vertebrates is made up of a number of small bones called .....................
Differentiate between
aves and mammals
Differentiate between
warm-blooded and cold-blooded animals.
Find the odd one out. Give reason.
snake, alligator, eel, turtle
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 |
On the basis of characteristics given below, name the phyla: Soft bodies, muscular foot, calcareous shell and presence of mantle.
Giving birth to young ones is described as ______.
The biggest vertebrate animal is the ______.
Assertion (A): Mammals give birth to their young ones.
Reason (R): Platypus is an egg-laying mammal.
Why are eggs of reptiles covered with shells unlike the eggs of amphibians?
