In order for materials to enter or exit any type of cell, it has to pass through the cell's selectively permeable barrier. What is the name of the cell's barrier PLEASE HELP I NEED THIS FOR MY NEXT CLASS PLEASEE

When a cell is in a solution that has the same concentration of water and solutes as its cytoplasm, the cell is said to be in a(n) solution. a. isotonic b. hypotonic c. hypertonic b. facilitated

Which of the following is true of metabolism in its entirety in all organisms? a) metabolism depends on a constant supply of energy from food. b) metabolism uses all of an organism's resources. c) metabolism consists of all the energy transformation reactions in an organism. d) metabolism manages the increase of entropy in an organism.

The type of fossil where the name literally means "turning to stone".