Question

< Question 5 of 5 > Stacked 0 0 Determine if each scenario describes directional, disruptive, or stabilizing selection. Assume that, in each scenario, the trait described is heritable. Directional selection Disruptive selection Stabilizing selection Answer Bank Two types of prey maintain a medium size of wasp galls on goldenrods. Birds eat only medium-sized seeds, leaving small and large seeds to germinate and flower. Humans choose larger and larger tomatoes over many generations. Humans keep their body temperature at 37 °C. This temperature is required for efficient metabolism. As prey develop resistance to a snake's venom, the venom becomes increasingly toxic over generations.

Answer 1

Stabilizing selection (Since the two types of prey chose the medium size and not the small or large size)

Disruptive selection (Since the birds feed only on medium-sized seeds, leaving the extremes i.e. small or large seeds)

Directional selection (Since humans chose only one extreme i.e. larger tomatoes)

Stabilizing selection (Since the normal body temperature is maintained by humans)

Directional selection (Since only after the development of resistance, the venom became more toxic)