Question

1. what does fitness mean in biology?

a) how fast an animal can run

b) an organisms ability to survive and reproduce

c) the ability to compete for food

d) having the best adaptation

Explanation:

In biology, "fitness" (Darwinian fitness) refers to an organism's ability to survive and reproduce in its environment, passing on genes. Option a is about speed (not fitness), c is about competition (narrow), d is about adaptation (fitness relates to reproductive success from adaptations, not just having the best). So b is correct.

Answer:

b) An organism's ability to survive and reproduce