Constipation and diarrhea, are both caused by a similar thing. Constipation is caused whenever there is too much buildup of food, or other food based material in the intestines. Usually this passes itself, yet constipation can also cause diarrhea through a bowel movement.
Considering the following statements;
A. The trait is the same for all organisms
B. The trait is resistant to mutations
C. Most forms of the trait have the same impact on survival
D. The trait is passed on genetically to the next generation
The correct answer is D.
Genetic variation is essential for natural selection since natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by mutation and random mating organisms.