A mutation may be harmful to an organism if it... A. Improves the DNA of the organism
B. Changes the genotype of the organism
C. Reduces the organisms's chances for survival and reproduction.
D. Change the phenotype of the organism

The answer is C. Reduces the organisms's chances for survival and reproduction.

C

Explanation:

A. If it improved it's not harmful

B. That is what a mutation is

C. They need to survive, so if it reduces their chances to do so it's bad.

D. That doesn't matter most of the time

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

answer; i believe that the correct answer is ; males are hemizygous for the x chromosome;