As global temperatures continue to rise, what is a likely outcome?
A) loss of populations of polar fish species
B) greater overharvesting of medicinal plant species
C) less greenhouse gas emissions
D) formation of new glaciers
Answer: A
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An example of an enzyme with high activity in an acidic environment is _____
A) amylase B) pepsin C) gastrin D) trypsin E) sucrose
Given that the Predator-Prey II model combines aspects of the Population Growth model and the Predator-Prey I model, what is causing the fluctuations and what causes the populations to eventually stabilize at zero population growth?
a. Fluctuations are caused by a population seeking its carrying capacity, while stability is caused by species interactions b. Fluctuations are caused by species interactions, while stability is apparently due to the carrying capacity of each species. c. Species interactions are the cause of both fluctuations and stabilization. d. Carrying capacity is the predominant force in both cases.
Which of the following is true of the kidneys found
in marine animals? a. smaller than terrestrial animals b. larger and more efficient than terrestrial animals c. secrete crystalline urea to conserve water balance d. use osmotic pressure and don’t have specialized kidneys e. none of these
The chemical bond connecting one nucleotide with the next along one strand of a DNA molecule is called a
A. hydrogen bond. B. phosphodiester bond. C. phosphate bond. D. glycosidic bond. E. peptide bond.