Abiologist measures the allele frequencies of pea plants in a very controlled environment. the plants can either have a dominant tall allele (t) or a recessive short allele (t). which of the following is a reason that this population is not at hardy-weinberg equilibrium?

a. the pea plants are mated at random.
b. both alleles ensure equal survival.
c. one pea plant mutates to have a new allele.
d. every pea plant reproduces exactly once.