A drought hits the habitat of a semi-aquatic bird population. All ponds dry up, and fish populations decline. There are two groups of birds in the population that differ in leg length and diet. Long-legged birds eat fish, while short-legged birds eat insects. The drought has little effect on insect populations.

Question

What is the main selective pressure in this scenario?
(1 point)
fish population
leg length
drought
insect population

Answer 1

The main selective pressure in this scenario is the drought, as it is directly impacting the availability of resources (fish in the ponds) for the bird population. This selective pressure is driving the birds to adapt their feeding behavior based on their leg length in response to the changing environment.

Answer 2

Bot A. B. C. or D.

Answer 3

C. drought