The mitochondria are the location for one of the processes in cellular respiration that converts ADP to ATP. Which process occurs here?
A) fermentation
B) Calvin cycle
C) Krebs cycle
D) glycolysis
Ans: C) Krebs cycle
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The following are steps involved in abscisic acid's (ABA) role in stomata closure. Arrange them in the correct order of events. a. The resulting voltage change across the guard cell plasma membranes opens gated transport proteins that allow potassium ions to exit the cells
b. ABA binding to its receptor on a guard cell membrane causes the release of nitric oxide (NO). The NO activates calcium transport proteins and an influx of calcium occurs. c. Water follows the solutes by osmosis. d. The guard cells lose turgor and collapse against one another, closing the stoma. e. Calcium influx activates transport proteins that pump negatively charged malate and chloride ions out of the cells. Thus, the overall charge of cytoplasm increases, and the overall charge of extracellular fluid decreases.
Viral meningitis normally requires aggressive antiviral treatment.
Answer the following statement true (T) or false (F)
Figure 28.2
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The following question refers to the accompanying figure illustrating soil horizons.
Which soil horizon has no organic matter or weathered rock?
A. O Horizon B. A Horizon C. B Horizon D. C Horizon E. Bedrock
Why does reinforcement involve a strengthening of prezygotic, rather than postzygotic, isolation?
A. The rewards of postzygotic isolation are always much smaller than those of prezygotic isolation. B. Reinforcement occurs only rarely. C. Postzygotic isolation has only a minimal evolutionary impact. D. Alleles that prevent interbreeding are more likely to be inherited by viable, nonhybrid offspring than alleles that permit random mating. E. Assortative mating is uncommon.