The plasma membrane is which means it permits the passage of only certain molecules into and out of the cell, and blocks the passage of some substance altogether

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic