PLEASE HELP! Use the diagram to answer the question below. The cell membrane plays an essential role in the life of the cell. How does the cell membrane help maintain the health of
the cell in the figure below?

a. The cell membrane regulates the movement of the minerals in and out of the cell

b. The cell membrane is where protein molecules are manufactured in a cell

c. The cell membrane provides support and protection for the cell

d. The cell membrane contains genetic information of the cell

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Vinegar has a ph of 3, and household ammonia has a ph of 11. is the concentration of h+ greatest in the vinegar or ammonia?