Bone and blood cells are considered?

The rate at which molecules water and oxygen can enter a cell is determined by the-

Which of these is not a function of some membrane proteins ? a.allowing polar molecules to enter the cell b.recognizing other types of cells c.receiving messeges from other cells b.carrying messages to oher cells

Astudent conducts an experiment to determine how the amount of water given to a plant affects it growth what is the dependent variable for this experiment