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?

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Coevolution has occurred between the bird species with longer beak lengths and the plant species with larger, tubular petal arrangements. This ecological process involves reciprocal evolutionary changes in two or more interacting species, where each species adapts to the selection pressures imposed by the other. In this case, the birds' longer beaks allow them to feed on larger, tubular flowers, which increases their fitness by providing greater access to nectar. This, in turn, benefits the plant species by increasing pollination success, which selects for larger, tubular flowers that match the longer beak lengths of the birds. Thus, the selection of bird beak length has led to the selection of large, tubular flower shape, and vice versa, demonstrating coevolution between the two species.

Natural Selection Requires That a Trait in a Species Is