Genes | Crossing over frequency A and B | 12.5%
A and C | 6%
B and C | 18.5%

What are the two most likely sequences of these genes on a gene map for this chromosome? Select two options
a. B, A,C
b. A, B,C
c. C, B,A
d. C, A,B

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water

How does interphase prepare cells for mitosis