Where will primary succession occur?
a. in a landscape with vegetation and soil
b. in a landscape with vegetation only
c. in a landscape with soil only
d. in a landscape without vegetation or soil

Which of the following describe the role a biochemical pump plays in active transport? a it prevents water from moving across the cell membrane. b it uses energy to move materials across the cell membrane against the concentration gradient. c it large molecules cross the cell membrane without using energy. d it a cell move molecules from an area of higher concentration to an area of lower concentration.