Question

the population of bass in the lake is decreasing because of overfishing. what will most likely happen to the other organisms in the food chain? a. the number of bluegill will decrease. b. the number of bluegill will stay the same. c. the number of caddisfly larva will decrease. d. the number of caddisfly larva will stay the same.

Explanation:

In a food chain, if the population of a predator (bass) decreases, the population of its prey (e.g., bluegill, if bass preys on bluegill) would typically increase initially, but here we analyze the options. Wait, actually, if bass (a predator) is overfished and decreases, the prey of bass (like bluegill) would have less predation, so bluegill numbers might increase? Wait, no, maybe I got the food chain wrong. Wait, maybe bluegill is preyed upon by bass. So if bass (predator) decreases, bluegill (prey) would have more survival, so their numbers would increase? But the options don't have that. Wait, maybe the food chain is caddisfly larva → bluegill → bass. So bass (top predator) decreasing: bluegill (middle) would increase (since less bass eating them), then bluegill eating more caddisfly larva, so caddisfly larva numbers decrease. Wait, but the options: let's re-examine. The options are about bluegill or caddisfly larva. Wait, maybe the original food chain is caddisfly larva is prey for bluegill, bluegill is prey for bass. So bass (predator of bluegill) decreases → bluegill population increases (since less predation) → bluegill eat more caddisfly larva → caddisfly larva population decreases. So option C: The number of caddisfly larva will decrease. Wait, but let's check the options again. Wait, maybe I messed up. Alternatively, if bass is a predator of bluegill, then bass decrease → bluegill increase (so A and B are wrong). Then bluegill (now more) eat more caddisfly larva, so caddisfly larva decrease (so C is correct, D is wrong). So the correct answer is C.

Answer:

C. The number of caddisfly larva will decrease.