Which aquatic zone in a lake will have the highest nutrient levels and therefore the densest microbial populations?
A. the littoral zone
B. the limnetic zone
C. the profundal zone
D. the benthic zone
E. the sediment zone
Answer: A
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Analysis of the number of target molecules in the original clinical specimen can be determined using which of the following molecular techniques?
a. Arbritary Primed PCR b. Peptide Nucleic Acid (PNA) FISH c. Nested PCR d. Quantitative PCR
The polymerase chain reaction (PCR) is a technique used to produce many copies of a specific DNA sequence
a. True b. False
Which of the following junctions influences
the passage of ions and small molecules between cells? a. gap b. adhering c. loose d. tight e. gated
What happens at higher altitudes?
a. The concentration of oxygen decreases.
b. The concentration of carbon dioxide increases. c. The partial pressure of oxygen decreases. d. The partial pressure of carbon dioxide increases. e. There is no change in the concentration or partial pressures of atmospheric gases.