We know that the Silurian period gave way to the Devonian period, which is when the Neogene era started, therefore:
The answer is B. before the Neogene era.
Hope it helped,
BioTeacher101
Molecules, like sugars, reach the carrier proteins in the membrane by diffusion and are then moved across the membrane from a region of high concentration to a region of low concentration.
SO they can have better access to sunlight and it helps the process of photosynthesis
