________ are proteins that promote depolymerization of extant microtubules at the ends.
Fill in the blank(s) with the appropriate word(s).
Catastrophins
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GnRH-producing cells in the brains of male cichlids are larger in territorial individuals
a. True b. False
Of the G3P generated in the Calvin cycle, 5/6 will be used to regenerate RuBP. A company
manufacturing widgets would go out of business if 5/6 of the widgets were recycled at the manufacturing site rather than being sold. And yet plants survive this extreme inefficiency. Why?
a. Actually, 5/6 of the G3P is used to build glucose and only 1/6 of the G3P is needed to regenerate RuBP. b. Plants are extremely efficient in other ways and that compensates for this anomaly. c. There is unlimited CO2 for the plant to use, so it's okay to "waste" some by regenerating RuBP. d. The plant expends no energy to acquire the light energy that drives the Calvin cycle, so there is no pressure on the system to become more efficient. e. The cyclic pathway of the light reactions compensates for the energy lost in RuBP regeneration.
In an adult human stem cell that has a total of 48 chromosomes, how many chromatids are present at prophase of mitosis?
A) 12 B) 24 C) 48 D) 72 E) 96
Turning inorganic carbon into organic carbon is called
A. mineralization. B. eutrophication. C. respiration. D. carbon fixation