Exam 4: Adaptations to Variable Environments　

If a goldfish is acclimated at 25°C, at which temperature would we expect the fish to swim fastest?

The figure shows plant growth responses to variation in availability of water. If this is an example of adaptive phenotypic plasticity, how would we expect the root-to-shoot ratio to be related to fitness?

Based on the figure, describe the phenotypic trade-offs of a fish being acclimated to 25°C compared to a fish acclimated to 5°C.

This figure shows the tail shape developed by three tadpole genotypes (M, N, and O) when raised in an environment with predators and an environment without predators. In the presence of predators, tadpoles with large tails have high fitness and tadpoles with small tails have low fitness. When predators are not present, tadpoles with large tails have low fitness and tadpoles with small tails have high fitness. Under which of the following situations would the plastic genotype be favored over other genotypes? I. if all environments have predators II. if no environments have predators III. if environments with predators are as common as environments without predators

What is the risk to a species of inbreeding depression?