An insect called a hummingbird hawk-moth uses its long tongue to drink nectar from flowers while it pollinates the plants whose flowers it visits. Which of these organisms do you think would have a niche similar to that of a
hummingbird hawk-moth?

answer:

A.Cardinal Or tarantula

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.