There is a population of birds that are different in feather, color and in diet. The green feathered birds, eat fish, while the red feathered birds eat insects. I just hit the habitat of this population. The drugs has no effect on the insect population, but it dries up the pons, and the fish population decline. The main select the pressure for the birds in this scenario is:

Question

There is a population of birds that are different in feather, color and in diet. The green feathered birds, eat fish, while the red feathered birds eat insects. I just hit the habitat of this population. The drugs has no effect on the insect population, but it dries up the pons, and the fish population decline. The main select the pressure for the birds in this scenario is:

A. The insect population

B. The fish population

C. The red feathers

D. The green feathers

Answer 1

B. The fish population

Answer 2

The main selective pressure for the birds in this scenario is:

B. The fish population

The reason for this is that the green feathered birds rely on fish as their main food source. If the fish population declines due to the drying up of the ponds caused by the drugs, it would directly affect the availability of food for the green feathered birds. This would put pressure on them to adapt and find alternative food sources or face a decline in their own population. Therefore, the decline in the fish population is the main selective pressure for the birds in this scenario.