The cell membrane is selectively permeable. Which type of membrane protein best illustrates this concept? A. channel
B. marker
C. receptor
D. hormone

*will mark brainliest* which of the following best describes a viral infection, such as the common cold? a. virus grow and develop in the body. b. virus are living organisms. c. viruses require host cells in the body. d. viruses can be treated with antibiotics.

Animals such as pronghorn antelope, bison ans badgers dot to the landscape. where are these animals located?

What happens when the cell copies its chromosomes