1. There is a finite amount of energy in the Biosphere.
O
O
True
False

true

Explanation:

the biosphere takes a huge part of the earth

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.