Researchers plotted a distribution curve for leg length in a population of birds, with length from short to long on the x-axis. The curve shifts to the right after a disturbance. Which statement is correct about natural selection in this population of birds? (1 point)
Birds with short legs were selected for.
Birds with long legs were selected for.
Birds with medium-length legs were selected for.
Birds with long legs and birds with short legs were selected for.
In peppered moth populations, light and dark moths are selected for in different environments. Which type selection is this, and what would a distribution curve for all peppered moths look like? (1 point)
stabilizing selection; two peaks at the extremes of the graph with a dip in the middle
stabilizing selection; a tail, narrow peak in the center of the graph
disruptive selection, two peaks at the extremes of the graph with a dip in the middle
disruptive selection; a tall, narrow peak in the center of the graph
1 answer
Regarding the distribution curve for leg length in the population of birds: Since the curve shifts to the right after a disturbance, it indicates that individuals with longer legs are favored in this environment. Therefore, the correct statement is:
Birds with long legs were selected for.
For the peppered moth populations: In different environments, light and dark moths are selected for, which indicates that individuals at the extremes (light and dark) are favored. This leads to a distribution curve that reflects disruptive selection. Thus, the correct answer would be:
disruptive selection; two peaks at the extremes of the graph with a dip in the middle.
