Adaptation is the structural and functional characterization of living organisms that develop over a period of time. A large number of animals aquatic habitat they are categorized as primary aquatic and secondarily aquatic. Primary aquatic are perfectly adapted for only water life and secondarily aquatic are well adapted to water life and also have handicapped of breathing. Aquatic organisms exhibit a number of adaptive features like change in body shape, modification of four Limbs, integument loses hair glands, etc. So take this quiz to know more about the adaptation of aquatic animals.
1. The Bony fishes have a gas-filled swim bladder as.........
A. Vestigial organs
B. Hydrostatic organ
C. Essential organ
D. None of these
2. In aquatic animals which limbs are disappeared due to the development of tail?
A. Fore limbs
B. Hind limbs
C. Both of these
D. None of these
3. Which one of the following is absent in aquatic mammals which make the contour of the head smooth?
A. Gills
B. Nares
C. External pinnae
D. Skeleton
4. Why the size of aquatic organisms is comparatively large?
A. Because they need more energy
B. Because it helps in swimming
C. Because it is necessary for reproduction
D. Because they do not have gravity effects
5. The Skeleton of aquatic organisms is soft, non-calcareous because they are unable to synthesis.......... At low temperature.
A. Protein
B. Iodine
C. Sulphur
D. Calcium
6. Which one of the following is a primary aquatic animal?
A. Fish
B. Frog
C. Crocodile
D. All of these
7. The body contour of aquatic animal is.......... Like which offer minimum resistance to water in swimming.
A. Circle
B. Spindle
C. Both of these
D. None of these
8. Secondarily aquatic animals have........
A. Gills
B. Lungs
C. Both of these
D. None of these
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