Which term best describes an animal that, although generating a significant amount of heat through metabolism, does not maintain a constant body temperature?
A) homeothermic endotherm
B) heterothermic ectotherm
C) homeothermic ectotherm
D) heterothermic endotherm
Answer: D
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The tailbone of humans is an example of a(n) ____
a. developing feature b. accidental feature c. vestigial feature d. great chain of being e. fossil structure
Which factor has the LEAST effect on the amount of incoming light that strikes an area?
a. latitude b. temperature c. the tilt of Earth’s axis d. the amount of cloud cover e. season
Which of the following statements best describes the role of NAD+/NADH in glycolysis?
A) NADH is used to directly create the phosphoanhydride bonds in ATP. B) NAD+ accepts electrons. C) NADH accepts electrons during fermentation. D) NADH is used primarily in substrate-level phosphorylation. E) All of the above are correct.
A research team began a study of a cultured cell line. Their preliminary observations showed them that the cell line did not exhibit either density-dependent inhibition or anchorage dependence. What could they conclude right away?
A) The cells are unable to form spindle microtubules. B) They have altered the series of cell cycle phases. C) The cells show characteristics of tumors. D) They were originally derived from an elderly organism.