What is the function of a cell’s selectively permeable plasma membrane? a) it the cell to manufacture proteins. b) it regulates the amount of atp the cell produces. c) it regulates what materials enter and leave the cell. eliminate d) it packages and stores most of the material in a cell.

The correct answer would be C) it regulates what materials enter and leave the cell. The purpose of the cell membrane is almost like a guard. It controls what goes in and out of the cell such as any need proteins to help the cell make energy, etc. Without it, the cell would either be letting pretty much anything into it which could mess up the functions of the cell, or the cell would be having difficulty letting in its needed nutrients to make energy. 

A) 4 amusingb)alpha particle is a helium nucleus. it contains 2 protons and 2 neutrons.c)alpha particle has charge of +2.