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प्रश्न
Fill in the blank.
Fishes obtain oxygen from water through ......................
उत्तर
Fishes obtain oxygen from water through gills.
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संबंधित प्रश्न
Fill in the blank.
........................... are considered as farmers’ friend of farmers.
Fill in the blank.
Annelids have special organs of excretion called ..............
Fill in the blank.
The animals without a backbone whose body is soft and often covered by a hard shell are .................
Fill in the blank.
Invertebrates with jointed legs belong to ....................
Answer in detail.
Why are mammals regarded as the most advanced animals?
Answer in detail.
How do fish exchange gases?
Give any one difference between protozoa and Metazoa.
Mention any one major similarity and one major difference in the following pairs of an animal:
Whales and Fishes
How are the reproductive characteristics of mammals different from those of aves?
On the basis of the position of the notochord, classify the different prochordates. Justify your answer.
