Question

19. Which of the following is NOT an example of materials that naturally cross the semi-permeable barrier of the cell membrane?



A. nutrients enter the cell


B. waste products exit the cell


C. oxygen enters the cell


D. mutated genetic waste exits the cell

Answer 1

b - waste

Answer 2

Thanks Leonardo!!

Answer 3

no problem :D

Answer 4

Those 2 are the only ones I needed! I do believe I have the others answered correctly, google wasn't helping :s.. but yet again THANKS. I've never used this site before... but I do believe I will start!!