Marine bony fishes produce a very small amount of urine whereas freshwater bony fish produce a large volume of urine. Why are they different?
What will be an ideal response?
They are different because they live in different types of water (seawater versus freshwater). The water differences result in different directions of flow by osmosis. Marine bony fishes tend to lose water by osmosis, so they produce only a small amount of urine. By contrast, freshwater bony fishes tend to gain water by osmosis, so they produce a large volume of urine.
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What will be an ideal response?
What was the minimal requirement to perform a "classic DNA fingerprinting" test in order to associate a blood sample with a criminal?
A. one sample of DNA, PCR amplification, restriction enzymes, and gel electrophoresis B. one sample of DNA, restriction enzymes, a DNA synthesizer, and gel electrophoresis C. two samples of DNA, PCR amplification, restriction enzymes, and gel electrophoresis D. two samples of DNA, PCR amplification, a DNA synthesizer, and gel electrophoresis
Herpes and other enveloped viruses enter their host
cells a. through pores. b. by dissolving the host plasma membrane. c. by fusion of the viral membrane with the cell’s plasma membrane. d. by activating transport proteins in the host cell’s plasma membrane. e. any of these.
In many freshwater systems, the limiting factor for
algal growth is a. oxygen. b. carbon dioxide. c. nitrogen. d. phosphorus. e. calcium.