Proteins perform numerous functions in the cell membrane, one of which is to regulate the movement of materials, atoms of elements and other ions as they are entering and exiting the cell. These proteins that play this significant role, would be classified as transmembrane proteins, which are specific kind of intergral proteins.
B, (layer C is the youngest layer) :)
Longitude lines are straight.
The cheek cell does not have a large central vacuole, cell wall, or chloroplast
The route the egg takes to get to the uterus is:
1. Ovaries
2. Fallopian tubes
3. Uterus
