Question

What does it mean for a cell membrane to be selectively permeable?

A.
It allows only water molecules to pass through.


B.
It allows some substances to pass through but blocks the passage of others.


C.
It allows molecules to pass through if they are under a certain size.


D.
It blocks the passage of most substances.

Answer 1

B. It allows some substances to pass through but blocks the passage of others

C would be the explanation for B which is why I chose B, even though both are true. I hope this helps and am very sorry if the answer is incorrect.

Answer 2

B.
It allows some substances to pass through but blocks the passage of others.