Natural Selection Requires That a Trait in a Species Is

Multiple Choice

Natural selection requires that a trait in a species is genetic,which is heritable within the population,and has variable forms of the trait that increase survival or confer reproductive advantages.Consider that there is variation in beak lengths of a bird that eats nectar from flowers,and the heritable longer beak length allows feeding from larger flowers of a plant species with more tubular petal arrangements.The birds having longer beaks are more prevalent,and their longer beaks make successful reproduction more common for the plants with larger,tubular flowers,because of increased pollination success.What ecological process has happened between these two species?

A) The bird beak length selection has led to the large, tubular flower selection through coevolution.
B) All of the answer choices are correct.
C) The birds with longer beaks and the flowers with tubular petals are selected for a commensalism relationship.
D) The niches of the bird species and the plant species have both dramatically changed.
E) The simultaneous selection of bird beak length and large, tubular flower shape has demonstrated competitive exclusion.