Which of the following is/are TRUE regarding the suprachiasmatic nucleus (SCN)?
a. GABA is released from neurons in the SCN
b. lesions in the SCN disrupt circadian rhythms
c. SCN neurons project to the hypothalamus, midbrain, and diencephalon
d. all of the above
e. a and b
Answer: d. all of the above
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In the Calvin-Benson cycle of photosynthesis,
after carbon dioxide is fixed into a six carbon molecule, what molecule is generated in the cycle next?
a. RuBP b. glucose c. PGA d. ATP e. NADPH
Glucose and sugars in DNA and RNA
a. have the same number of carbon atoms. b. have the same structural formulas. c. are the two components of sucrose. d. are monosaccharides. e. are both components of RNA
Select the best reason why collagen fibers are abundant in tendons
a. abrasion b. contractility c. protection d. strength e. secretion
Which of the following describes primary succession?
a. succession on land that previously had no life
b. succession that moves a community away from equilibrium
c. succession in response to a natural disturbance
d. succession characterized by equilibrium