I am not sure on this but I think it would be B) sorry if this is not the correct answer
Answer:
Carrier protein help molecules to move through a cell membrane.
Explanation:
Carrier protein help molecules to move through a cell membrane.
Carrier proteins transport ions and molecules either through facilitated diffusion or by secondary active transport. These proteins also bind to a specific molecule that needs to be transported.
Producers synthesize their food through photosynthesis using energy from sunlight and carbon dioxide from the Air. Their respiration returns carbon dioxide to the atmosphere. Consumers use the food produced by producers for energy. Their respiration also returns carbon dioxide to the atmosphere.
the answer is b ..........
Explanation:
b
