Which of the following best explains the central role of carbon in the chemistry of living organisms?

a. carbon forms many molecules with ionic bonds
b. carbon forms many molecules with convalece bonds
c. carbon forms many molecules with hydrogen bonds
d. carbon can only bond to other carbon atoms

Which of the following is a difference between active transport and facilitated diffusion? view available hint(s)which of the following is a difference between active transport and facilitated diffusion? facilitated diffusion can move solutes against a concentration gradient, and active transport cannot.active transport involves transport proteins, and facilitated diffusion does not.facilitated diffusion involves transport proteins, and active transport does not.active transport requires the expenditure of cellular energy, and facilitated diffusion does not.

Long term exposure to waves can cause sunburns and skin cancer.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic