Which of the following best describes a deciduous tree?
A tree whose leaves change color and fall
from the tree.
A tree that only lives for one year.
A pine tree that never loses its needles.

A tree whose leaves change color and fall

Explanation: Deciduous trees are the ones that have the more traditional leaves that fall down as opposed to coniferous trees that have needles.

biology is the study of life. it is the study of living organism.

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.