Which statement best describes the plasma membrane

A. It is selectively Permeable to certain substances.

B. It’s rigidity does not allow materials to enter the cell.

C. It is nonpermeable to substances outside of the cell.

D. It is freely permeable to all substances.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Earths energy sources include both renewable and nonrenewable resources. name at least three sources of energy that could be used in your house. then describe the ideal energy source for generating most of your homes electricity, and explain why you chose that source. can someone give me some ideas, i’m kinda confused.

Which hypothesis most likely explains the results at 60°c and 70°c