The C4 mechanism of carbon fixation is an advantage for plants that live in:
a) ponds or other bodies of fresh water.
b) swamps or bogs.
c) the shade of other plants.
d) hot, dry climates.
e) tropical climates.
Ans: d) hot, dry climates.
You might also like to view...
Which of the following statements about allosteric control of enzymatic activity is true?
A. Allosteric proteins are generally composed of a single protein. B. Heterotropic allosteric effectors compete with substrate for binding sites. C. Homotropic allosteric effectors compete with product for binding sites. D. Allosteric effectors enhance the hyperbolic nature of V0 versus [S] kinetic plots. E. Allosteric effectors give rise to the sigmoidal nature of V0 versus [S] kinetic plots.
Some bacteria have a cytoskeleton of sterols to help maintain their shape.
Answer the following statement true (T) or false (F)
The eyeless gene of Drosophila
a. has counterparts in humans. b. has counterparts in mice. c. has counterparts in squids. d. points to a shared ancestor among evolutionarily distant animals. e. is all of these.
Which of the following whale species are recovering their population numbers as a result of whale harvesting regulations?I-right whalesII-Pacific gray whalesIII-sperm whalesIV-fin whalesV-humpback whales
A. I, II, and V B. I and II C. II and V D. I, II, III, and IV E. I, II, and III