Answer:
Cell membranes protect and organize cells. All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in.
Answer:
C: Skin Cells forming from sunlight
Explanation:
The answer is A because in a life cycle it start of in birth, then growing up, then adult then giving birth and then death. after death or birth the life cycle starts all over again. but in actuality when it gives birth that's when the life cycle is restarted. think as it's us humans. we are born. after that we grow up to be a toddler - young kid => teenager => young adult => then women gives birth => new baby is born. when new baby is born then the life cycle is restarted. but the next step after a baby's born the mom and dad get old and then death is the last step.<span />
Answer:
example of active transport is the sodium-potassium pump, which moves sodium ions to the outside of the cell and potassium ions to the inside of the cell.
