Question

a certain population of birds can have one of three beak lengths: short, medium, or long. birds with short and long beaks can more easily eat seeds than birds with medium beaks. a scientist studies this population of birds for ten years. most of the birds at the beginning of the study have medium - sized beaks. how might natural selection change beak length in this population of birds over time? move the labels to the boxes on the graph.

Explanation:

Natural selection favors traits that increase survival and reproduction. Since birds with short and long beaks can more easily eat seeds than those with medium - beaks, over time, the frequency of short - and long - beaked birds will increase, and the frequency of medium - beaked birds will decrease. The average beak length at the end of the study will be different from the start as the population composition changes. The distribution will shift towards short and long beak lengths.

Answer:

From left to right in the boxes on the graph: Long Beak Length, Average beak length at the beginning of the study, Short Beak Length, Average beak length at the end of the study.