The channels in cell membranes that help substances to move in and out 20 poll of cells during active transport are made of
A. protein.
B. chlorophyll.
C. cytoplasm
D. carbohydrates
NEED ASAP

The many volcanoes located along the edge of the pacific ocean make up the ring of fire. how does subduction play a role in the volcanic activity in the ring of fire?

!if we removed the wolf, snake, and hawk from this food web, what best explains the impact it would have? a) the number of producers would increase. b)the number of decomposers would increase. c)the number of primary consumers would increase. d)the numbers of primary consumers would decrease.

How do accessory pigments chlorophyll?