Question

a population of green iguanas lived on a tropical island. originally, most of the iguanas had feet without webbing between their toes and a long, round tail. a few iguanas had webbed feet and a short, flat tail. as the years passed, the island became smaller and smaller due to flooding. even the land areas were dotted with ponds and pools. the iguanas had a hard time locating their normal food sources and began swimming from island to island to find food. which of the following most likely describes the iguana population five hundred generations after the island flooded and food became harder to find? a the iguanas will look the same but there will be less of them. b there would be fewer iguanas with webbed feet. c the iguanas would no longer be green. d there would be more iguanas with webbed feet and flat tails.

Explanation:

This question is about natural selection. The iguanas started swimming to find food, so traits like webbed feet and flat tails (which help in swimming) would be advantageous. Over generations, natural selection would favor these traits, leading to more iguanas with them. Option A is wrong because traits should change. Option B is wrong as webbed feet are beneficial. Option C is wrong as there's no reason for color change. Option D matches the idea of natural selection favoring adaptive traits.

Answer:

D. There would be more iguanas with webbed feet and flat tails.