The limitation on microbial growth rate at high nutrient levels is/are ________.
A. the saturation of the transport proteins for nutrient uptake
B. the rate of DNA replication
C. the rate of protein synthesis
D. All of the choices are correct.
Answer: A
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Cartilaginous fishes retain __________ in their body, so they do not lose or gain water by osmosis. Fill in the blank(s) with the appropriate word(s)
Which of the following statements is false?
a. A heart will stop beating when the nerves to the heart are severed. b. Some cardiac muscle cells are self-excitatory. c. The pacemaker of the heart is the sinoatrial node. d. Cardiac muscle cells have numerous gap junctions on their sides to allow rapid communication. e. Cardiac muscle cells of the two ventricles contract essentially in unison.
Heat loss resulting from conversion of a liquid to a
gas is called a. conduction. b. radiation. c. convection. d. metabolism. e. evaporation.
Transgenic salmon are genetically engineered to grow faster than their wild type counterparts. They do not grow
larger; they simply reach their full size in shorter time. Transgenic salmon that are grown in outdoor pens are all sterile (non-reproducing) females. Why is this important? What will be an ideal response?