Consulting Figure 7.1 if necessary, during which stage(s) of cellular respiration is(are) carbon dioxide released?
A. stage 1 only
B. stages 1 and 2
C. stages 2 and 3
D. stage 3 only
E. stages 3 and 4
C
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In early experiments to understand the control of the cell cycle, researchers fused HeLa cells that were at different
stages of the cell cycle. What did the results of these experiments suggest?
a. The concentrations of cyclin dependent kinases (Cdks) fluctuate throughout the cell cycle. b. The concentrations of cyclins fluctuate throughout the cell cycle. c. The cell cycle has three checkpoints through which the cell must pass in order to progress through to mitosis. d. Microtubules play an essential role in the progression of the cell cycle. e. Molecules in the cytoplasm control the progression of the cell cycle.
Carotenoids are accessory pigments that ____
a. absorb yellow and red light to assist in photosynthesis b. capture energy from light and use it directly in cellular respiration c. are masked by the presence of chlorophyll throughout the growing season d. absorb blue and violet wavelengths and reflect green and yellow e. reflect blue wavelengths
Which of the following is (are) true about predator–
prey coevolution? a. Each species exerts selection pressure on the other. b. Predators are selective agents that favor improved prey defenses. c. Prey with better defenses are selective agents that favor better predator hunting skills. d. All of the above are true. e. None of the above are true.
All of the following are associated with bubonic plague except
A. it is transmitted by human feces. B. the caused by Yersinia pestis. C. the patient often has enlarged inguinal lymph nodes. D. the patient has fever, headache, nausea, weakness. E. it can progress to a septicemia.