Beta-carotene is converted to vitamin ____ in the cells of the small intestine
a. B12
b. A
c. E
d. C
e. D
ANSWER: b
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Imagine that you are managing a large game ranch. You know from historical accounts that a species of deer used to live there, but they have been extirpated
After doing some research to determine what might be an appropriately sized founding population, you reintroduce them. You then watch the population increase for several generations, and graph the number of individuals (vertical axis) against the number of generations (horizontal axis). With no natural predators impacting the population, the graph will likely appear as _____. A) a diagonal line, getting higher with each generation B) an "S" that ends with a vertical line C) an upside-down "U" D) a "J," increasing with each generation
Match the kind of plastid with its function.
A) chromosome movement B) flower color C) plastid precursor D) nucleic acid production E) lipid storage F) starch storage G) protein production H) chloride storage I) photosynthesis J) protein storage 1) proplastid 2) amyloplast 3) chloroplast 4) chromoplast 5) elaioplast
One mole of a substance contains 6.02 x 1023 molecules. The atomic number of Li is 3 and the atomic mass is approximately 7. If you have three moles of Li, how many grams does it weigh?
A. 9 B. 21 C. 7 x 6.02 x 1023 D. 3 x 6.02 x 1023
What do veins have that arteries lack?
a. a tunica externa b. oxygenated blood c. an inner membrane of endothelium d. blood flowing from the heart e. valves