A DNA molecule containing 32% thymine would contain how much cytosine?
A. 18%
B. 36%
C. 32%
D. 64%
Answer: A
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Research suggests that contamination of water by agricultural chemicals appears to____
a. increase sperm count b. decrease sperm count c. increase sperm motility d. eliminate sperm production completely e. have no effect on sperm
In the light-dependent reactions of photosynthesis,NADP+ gets its electrons to become NADPH from ____
a. ATP synthase b. the flow of hydrogen ions c. electron transfer chains d. oxygen gas e. glucose
Ecological models can be mathematical or they can be verbally descriptive
Indicate whether the statement is true or false
Which of the following is TRUE when the lung volume is equal to the functional residual capacity?
A) Intra-alveolar pressure is less than intrapleural pressure. B) Intra-alveolar pressure is greater than atmospheric pressure. C) The elastic recoil of the lungs is balanced by the elastic recoil of the chest wall. D) Intrapleural pressure is zero. E) Intra-alveolar pressure is less than atmospheric pressure.