Tobacco smoke:
a. exposes the smoker to less than 10 carcinogens
b. presents more of a risk to male smokers than to female smokers
c. takes a long time to manifest in a decrease of respiratory function
d. increases respiratory infections
e. increases carbon dioxide blood levels but decreases carbon monoxide blood levels
d
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Which of the following pathways would be used for photosynthesis by a cactus found in the desert?
A. C4 pathway B. C3 pathway C. CAM pathway D. Krebs cycle E. All of the answer choices are correct.
Based on the temperature range and precipitation, which area in Figure 56-1 is dominated by pine
trees? a. 3 b. 4 c. 5 d. 6 e. 7
A(n) ____ is a polymer.
A. monosaccharide B. amino acid C. nucleotide D. polypeptide
The Calvin cycle requires all of the following except:
A) ATP. B) NADPH. C) RuBP. D) O2.