The answer would be D I know this cause I took the same test heheh :)
Answer:
e. natural selection
Explanation:
The theory of natural selection was coined by Charles Darwin. It is based on the fitness of certain phenotypes to survive changing environments. The difference in phenotypes arises from mutations in the genome due to pressure from the environment [can refer to the cell, interacting cells, population or ecosystem]. These mutations are heritable and become phenotype traits that are common in a surviving population.
1. The dominant trait is yellow peas, whereas the recessive trait is green peas.
Let yellow peas be YY and green peas be Yy
2. the genotype of the parents are YY and Yy.
3. The punnett squares contain the first set of peas and second set.
4. You can see that in the second crossbreed, the different coloured square represents what will become green peas. Thus the ratio would be 3:1.