A particular population of bird exhibits variation in beak size. Several years ago, a change occurred in the environment where the bird population lives. The graph below shows how the distribution of beak size changed within the population from the point when the change occurred to the present.

Which of the following best describes the change that occurred?
A.
The change caused individuals with larger beaks to be less likely to survive and reproduce.
B.
The change caused individuals with larger beaks to be more likely to survive and reproduce.
C.
The change caused individuals within the population to grow smaller beaks.
D.
The change caused individuals within the population to grow larger beaks.

Two male mice, which we will call male a and male b, are both phenotypically normal. male a was from a litter that contained half phenotypically normal mice and half dwarf mice. the mother of male a was known to be homozygous for the normal igf2 allele. male b was from a litter of eight mice that were all phenotypically normal. the parents of male b were a phenotypically normal male and a dwarf female. male a and male b were put into a cage with two female mice that we will call female a and female b. female a is a dwarf and female b is phenotypically normal. the parents of these two females were unknown, although it was known that they were from the same litter. the mice were allowed to mate with each other, and the following data were obtained: female a gave birth to three dwarf babies and four normal babies. female b gave birth to four normal babies and two dwarf babies. which male(s)mated with female a and female b? male a with both females male a with female b, and male b with female a male a with female a, and male b with female b could not be determined male b with both females

The allele for curly hair is incompletely dominant. if a mother is homozygous for curly hair and the father is homozygous for straight hair, what percentage of the offspring will exhibit characteristics of both parents? 25 percent 50 percent 75 percent 100 percent

Which units ate used to measure both velocity and speed? check all that apply