From an evolutionary standpoint, which of the following organisms would be the most fit?
a. a tree that produces thousands of seeds, of which three grow to sexual maturity
b. a bird that produces offspring, of which three survive to reproduce
c. an elephant that has a single offspring that nurses for 8 months and reaches sexual
maturity in 10 years
d. both (a) and (b)
D
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You do an experiment in the laboratory and add increasing amounts of substrate to a solution
containing an enzyme and a pH buffer. You incubate the container at the optimal temperature for your enzyme. Each time you add more substrate, you measure the rate of the reaction. If you graph the results where the x-axis shows the substrate concentration and the y-axis shows the resulting reaction rate, what will you find over time?
a. The rate of the reaction will proceed with a slope of 1 and continue in a linear fashion indefinitely or until you run out of reactants. b. The rate of the reaction will increase rapidly, taper off, and plateau. c. The rate of the reaction will increase slowly, plateau, and then drop sharply back to zero. d. The resulting graph will be a perfect bell curve. e. There is no way to predict what the graph will look like without more information.
A viral lytic cycle is characterized by:
a. rapid infection and emergence. b. rapid infection, replication of nucleic acids and proteins, assembly of virions and release by rupture. c. a virus remaining in the host cell then being released. d. a viral nucleic acid being inserted into the host genome and possibly residing through multiple cell divisions prior to lytic.
Movable bones are features of the sense organs
associated with a. sight. b. hearing. c. taste. d. smell. e. touch.
Prop roots are more common in:
a. annuals. b. eudicots. c. monocots. d. epiphytes. e. parasitic plants.