C4 plants have better water conservation abilities than do many other plants (especially C3). This is because:
a) C3 plants are able to keep their stomata closed during the day.
b) C4 plants have smaller stomata that are protected by hairs and pits.
c) C4 plants open their stomata at night.
d) C4 plants have no leaves, they use their stems for photosynthesis.
e) C4 plants have the ability to obtain CO2 without opening their stomata.
Ans: c) C4 plants open their stomata at night
You might also like to view...
Which of the following is a way in which bacteria help the environment?
A) They are used to water in sewage treatment facilities. B) They break down dead organisms in the soil and recycle nutrients. C) They remove pollutants from the environment. D) All of the above are ways in which bacteria help the environment.
What is one cellular characteristic found in all prokaryotic and eukaryotic cells?
a. nucleus b. nucleoplasm c. chloroplast d. mitochondria e. plasma membrane
Membrane proteins serve many functions. One of the functions is transportation of substances across the membrane. If a cell biologist placed cells into an environment in which a chemical has been added that blocks the function of only carrier proteins, the process that will be affected is
A. pinocytosis. B. phagocytosis. C. simple diffusion. D. active transport. E. osmosis.
The lipid layer that forms the foundation of cell membranes is primarily composed of molecules called ________.
A. proteins B. carbohydrates C. fats D. phospholipids