Division of the cytoplasm in animal cells begins _____
a. as microtubules assemble at each pole of the nucleus
b. as Golgi body vesicles are guided by microtubules to the center of the cell
c. during S phase
d. as rigid phospholipid bilayer is synthesized in between the dividing cells
e. as a cleavage furrow is created by microfilaments in the cell's midsection
ANSWER: e
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Both ATP and NADPH are required for
A. the Calvin cycle only. B. the light reaction only. C. electron transport through the thylakoid membrane. D. both the light reaction and Calvin cycle. E. neither the light reaction nor the Calvin cycle.
Steroid hormones include
a. estrogens. b. growth hormone. c. melatonin. d. thyroid hormone. e. oxytocin.
Nonpolar compounds are defined as ________ because they do not form bonds with water.
Fill in the blank(s) with the appropriate word(s).
Which term and definition is incorrect?
-Sleep latency is the time it takes a person to enter REM sleep -Total Sleep Time (TST) is the time one spends asleep in one sleep period -Sleep efficiency refers to the amount of time spent in bed in comparison to the time one spends asleep -Partial sleep deprivation (PSD) occurs when a person is allowed to sleep, but is prevented from entering certain stage