Assertion: Aquatic plants and animals survive in water. Reason: Dissolved oxygen is available for animal and plants for respiration and survival *
1 point
a. (a)
b. (b)
c. (c)
d. (d)
Answers
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3
Correct option is
C
Aquatic animals use oxygen gas dissolved in water to respire.
The oxygen dissolve in marine water by diffusion from the surrounding air; aeration of water that has tumbled over falls and rapids; and as a waste product of photosynthesis. This dissolved oxygen is then used by marine animals for respiration.
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