Answer:
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion
Explanation:
Transport proteins generally perform two types of transport: “facilitated diffusion,” where a transport protein simply creates an opening for a substance to diffuse down its concentration gradient; and “active transport,” where the cell expends energy in order to move a substance against its concentration gradient
Answer:
Water slips between cracks in rocks on earth this is called weathering but on the moon there is no water so this cannot happen.
Answer: these are secondary metabolites
Explanation:
These secondary metabolites are chemical compounds found in some fungi, bacteria and some plants. They are not involved in true normal growth and other processor in these organisms, but they often help protect plants from herbivory and these include terpenes, alkaloids, phenols etc.
The answer is B. this has to be 20 characters long.
