One major function of the endomembrane system is transporting substances in and out of a cell.
The answer is probably (A)
Answer:
The information in the passage suggests that in mice CRY1 likely affects XPA by repressing the XPA-encoding gene transcription as shown in the graph which indicates a lowering of XPA levels when CRY1 levels is raised.
The producers would grow more food to be eaten but the secondary/tertiary etc consumers would have nothing to eat and so numbers would drop on that side
