Following their respective breeding seasons,several species of hummingbirds occur at the same locations in North America and several hummingbird flowers bloom simultaneously in these habitats.These flowers seem to have converged to a common morphology and color.Birds are most visually sensitive to the color red.Hummingbird flowers are pollinated by hummingbirds.Which of the following features of these flowers would indicate they have coevolved with hummingbirds? (Check all that apply)
A)long tubular flowers
B)flowers are colored violet and blue
C)blooming time of the flowers coincides with the arrival of the hummingbirds
D)flowers produce a high volume of nectar and sugar
E)flowers are low to the ground

Question

Quizplus · Accepted Answer

The long tubular shape of the flowers is an adaptation to the long, narrow beaks of hummingbirds, allowing them to reach the nectar deep within the flower. The blooming time coinciding with the hummingbird arrival suggests a coevolutionary relationship, where the birds are driving the timing of the flowers' reproduction. The high volume of nectar and sugar in the flowers is also an adaptation to the high metabolic demands of hummingbirds, who require a lot of energy to sustain their high levels of activity. The color violet and blue is not as important since birds are most visually sensitive to the color red, which is the color of many hummingbird-pollinated flowers. The height of the flowers is not as important since hummingbirds are capable of hovering in mid-air to reach flowers at different heights.

Following Their Respective Breeding Seasons,several Species of Hummingbirds Occur at the Same