Hemoglobin in the blood carries oxygen from the respiratory organs (lungs or gills) to the rest of the body (i.e. the tissues). There it releases the oxygen to permit aerobic respiration to provide energy to power the functions of the organism in the process called metabolism.
Which chart depicts the evolutionary relationship between the hummingbirds and flowers described?
Certain types of red-colored flowers produce nectar that is chemically ideal as food for a hummingbird. The hummingbird can easily locate these flowers because it can see the color red especially well. The recurved petals of these flowers remain out of the hummingbird’s way while it extracts nectar with its long beak that is perfectly suited for the task. As it does so, the hummingbird’s head feathers brush against the flowers, collecting pollen that it carries away and disperses.