The cell membrane to control what enters and leaves a cell. which of these substances, which accounts for about two-thirds of a cell's mass, is constantly moving in and out of the cell?

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."

Which statement is true for bacteria a. bacteria have complex internal structures b. all bacteria are spiral in shape c. all bacteria cause disease in animals d. bacteria break down some foods