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प्रश्न
What are adaptations in fishes due to which they are aquatic?
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उत्तर
Certain adaptation characteristics in fish, due to which they are aquatic, include:
(i) Presence of gills for respiration
(ii) Fins for locomotion (swimming) and balance with a streamlined or spindle-shaped body
(iii) Cold-blooded (ecothermic)
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संबंधित प्रश्न
Match the animals given under column A with their respective classification group given under column B
| Column A | Column B | ||
| 1 | Sponge | a | Amphibia |
| 2 | Snail | b | Reptilia |
| 3 | Butterfly | c | Echinodermata |
| 4 | Toad | d | Mollusca |
| 5 | Lizard | e | Arthropoda |
| 6 | Starfish | f | Porifera |
What do you mean by the term triploblastic animals? Give two example.
Write down four characters of Chondrichtyes. Give two examples.
Write down four characters of Osteichtyes and give two examples.
What are differences between the following :
(a) Cartilaginous fishes and bony fishes ;
(b) Amphibia and Reptilia ;
(c) Aves and mammals.
Explain the general charaters of phylum Mollusca. Give one example of following classes of Mollusca;
(i) Gastropoda;
(ii) Pelecypoda;
(iii) Cephalopoda.
Explain the general characters of phylum Arthropoda. Give one example of following classes
(i) Crustacea;
(ii) Myriapoda;
(iii) Insecta;
(iv) Arachnida.
Why are scientific names of living beings considered better than their common names?
What are the group names of the following categories of animals?
Animals with a backbone _____________
Give any one difference between the following :
Insecta and Arachnida
Given below is an animal followed by three terms or features. Underline the term which does not match with the animal.
Earthworm - Invertebrata, Annelida, Insecta
Given below is an animal followed by three terms or features. Underline the term which does not match with the animal.
Grasshopper-Wings, trachea, proboscis
Write name of any poikilothermic animal.
Give two examples of each of the following: Echinodermata
Give two examples of each of the following: Nemathelminthes
Give two examples of each of the following: Arthropoda
Fill in the blanks:
The excretory organs of platyhelminthes are ______.
Fill in the blanks:
Bath sponge belongs to phylum ______.
Assertion: Binomial name is the universal name and contains two names.
Reason: It was first introduced by Carolus Linnaeus
Bilaterally symmetrical and acoelomate animal are exemplified by:
