The cuticle
a. conserves water.
b. reduces absorption of carbon dioxide by the
plant.
c. relegates transpiration to the stomata.
d. helps prevent wilting.
e. does all of these.
Answer: e
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A. The succinyl-CoA/glycine porphyrin pathway is used by all bacteria, photosynthetic eukaryotes, and archaea. B. The porphyrin biosynthetic pathways are unified at the step of 5-aminolevulinic acid. C. The glutamate porphyrin pathway is used by all non-photosynthetic eukaryotes and alpha-proteobacteria. D. There is very little conservation of porphyrin synthesis pathways between eukaryotes, bacteria, and archaea.
If carbon has an atomic mass of 12 and an atomic number of 6 then it has
A. 6 electrons. B. 12 electrons. C. 18 electrons. D. as many as 6 but no more than 12. E. None of the choices are correct.
Amylose is a polymer made up of glucose monomers joined by ____
a. b(1-4) linkages b. b(1-6) linkages c. a(1-4) linkages d. a(1-6) linkages e. both b(1-4) and a(1-6) linkages
In an experiment, the control group is
a. not subjected to experimental error. b. exposed to experimental treatments. c. maintained under strict laboratory conditions. d. treated exactly the same as the experimental group, except for one variable. e. statistically the most important part of the experiment.