If a liquid is sealed in a container and kept at constant temperature, how does its vapor pressure change over time?
a. it continues to steadily increase.
b. it increases at first, then remains constant.
c. it increases at first, then decreases.
d. it continues to steadily decrease.

Explain why phospholipid molecules form a bilayer. (3 marks)

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

Environmental science are unconsidered with methods to preserve natural resourcesa.trueb.false