Which cells form the stomata?

A. sieve cells

B. guard cells

C. phloem cells

D. mesophyll cells

Why do you think that only single-celled organisms live in the hadalpelagic zone?

Which of the following is NOT a main part of the endocrine system? pituitary glands thyroid glands adrenal glands biometric glands

is a process that's absent in cellular respiration in anaerobic organisms but present in aerobic organisms. is a process that doesn't require oxygen.

4. What will happen to a virus that causes an extremely high mortality in the host? A. It will eventually achieve world domination B. It will cause the extinction of the host C. The virus will die out because they cannot live without a host

Which organisms is more specialized?

Earth's tectonic plates A. move in similar ways today as they did in the past. B. can move up and down but not sideways. C. didn't start moving until the 21st Century. D. moved only during Earth's earliest period of history.

Why is taking vitamin c ineffective at enhancing iron absorption from standard iron supplements?

5. If the pressure exerted on a gas in a flexible container is increased does the density of the gas change? Why or why not? Explain your answer

What is the role of cellular reproduction in maintaining genetic continuity

What is the trait that distinguishes primates, rodents / rabbits, crocodiles, and dinosaurs / birds from amphibians and earlier lineages?