Which of the following describes how a pole differs from saw timber? O A pole is not measured based on the age of the plant.
O A pole is not large enough to be harvested for Industrial use.
O A pole is of a different helght dependent on the species of tree.
O A pole is at its final stage of growth and will not get much wider.

the answer is c) an oak tree

a. the production of carbon dioxide through the process of photosynthesis

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.