Which region contains the largest amount of the global carbon pool?
A) fossil fuels
B) aboveground terrestrial systems
C) ocean
D) atmosphere
C
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The -OH group in a carbohydrate
A. may be found above or below the plane of the ring. B. is involved in the formation of stereoisomers. C. is involved when linking monosaccharides together. D. All of the choices are true.
The atomic number of an atom refers to its ____.
A. mass or weight B. number of protons C. number of protons and neutrons D. number of neutrons E. number of electrons
Which hormone prevents a seed released in the fall from germinating immediately?
A) auxins B) abscisic acid (ABA) C) gibberellins D) ethylene
The local mediator nitric oxide stimulates the intracellular enzyme guanylyl cyclase by ________________
(a) activating a Gprotein. (b) activating a receptor tyrosine kinase. (c) diffusing into cells and stimulating the cyclase directly. (d) activating an intracellular protein kinase.