Pea plants have a covering on their seeds, known as a pod. A green pod is the dominant trait, and a yellow pod is a recessive trait. Which statement
must be true for the parents of a plant with a yellow pod? You can do a
Punnet square to help you get your answer.

answer///multiple alleles;

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.