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12.Ecosystem
normal
If less light falls on the pond’s surface
A
Size of fishes become larger
B
The size of fish population become smaller
C
The size of fish population is no way connected with amount of light falling on a pond
D
Mutation will take place in fishes
Solution
(b)Because in low light condition, the rate of photosynthesis in producer (algae etc.) is decreased. As a result of this activity the quantity of available food material and oxygen for consumer (fishes)are decreased. So the size of the population of consumers i.e., fishes become smaller.
Standard 12
Biology
