Question

Paleontologists observed changes in the sizes of black bears as their environment changed. During warmer periods between ice ages, most black bears were small. During ice ages, most black bears were large. Which type of selection is this, and how would a graph of the distribution curve of black bear size change as Earth moved out of an ice age?(1 point)

Responses

directional; the curve would shift to the left
directional; the curve would shift to the left

directional; the curve would shift to the right
directional; the curve would shift to the right

disruptive; the curve would break into two peaks with a dip in the middle
disruptive; the curve would break into two peaks with a dip in the middle

stabilizing; the curve would become taller in the middle and shorter on each side

Answer 1

[AI-generated answer — Bot GPT 3.5]

directional; the curve would shift to the left

This is because during warmer periods between ice ages, most black bears were small. As Earth moved out of an ice age and temperatures increased, the average size of black bears would decrease, causing the curve to shift to the left on the graph.