Question

suppose that a plant disease kills all the fruit. the change could become a on the birds. flock z done natural selection selective pressure genetic variation s with three genetic ed initially due cks birds have able to pierce a

Explanation:

A plant disease killing all the fruit affects the birds' food source. Selective pressure refers to factors in the environment that influence the survival and reproduction of organisms. Here, the lack of fruit (due to the disease) is a factor that can exert pressure on the birds (e.g., birds that can find alternative food sources may be more likely to survive). Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring, which is a broader concept that can be influenced by selective pressure. Genetic variation is the difference in DNA among individuals or populations. Since the question is about the change (plant - disease - caused fruit loss) acting on the birds, it is about the environmental factor (selective pressure) rather than the process of natural selection itself (which is more about the outcome of such pressures over time) or genetic variation (which is an internal characteristic of the birds' population).

Answer:

selective pressure