One consequence of global warming is the melting of the glaciers and the resulting rise in sea levels. What will likely be the direct effect of this increase in sea levels on coral reefs?
A) Productivity will increase as the pure water from the glaciers dilutes the nutrients in the sea.
B) Coral reefs in shallow waters will grow more rapidly due to added protection against harmful UV radiation.
C) Coral reefs will be stimulated to grow faster due to the dilution of the seawater's salt content.
D) Productivity will decrease as nutrients trapped in the glacial ice are released and spread throughout the oceans by currents.
E) Coral reefs in deeper waters will die because insufficient light reaches them for photosynthesis.
E
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What must happen to amino acids before they can be used in catabolic reactions?
A. They must be decarboxylated B. They must be deoxygenated C. They must be dehydrogenated D. They must be deaminated
What might occur if blood calcium levels rise?
A. Blood parathyroid hormone levels would decrease. B. Blood parathyroid hormone levels would increase. C. Blood vitamin D (1,25 dihydroxyvitamin D) would be stimulated. D. Blood calcium levels are not under control by hormones. E. Vitamin D would be converted to vitamin E.
Chromatin consists of ________
A) DNA and protein B) RNA and protein C) protein only D) DNA only
Hardy-Weinberg pointed out that the original proportions of the genotypes in a population would remain constant from generation to generation if certain assumptions are met. Which one of the following is not a Hardy-Weinberg condition?
A. The population is very large. B. No polymorphic loci exist in the population. C. Random mating occurs. D. No gene flow occurs. E. No selection occurs.