A farmer decides not to reseed one of his agricultural fields for a year. Which of the following
is(are) characteristics of plants that will grow in the field during this period?
a. plants with a narrow ecological niche
b. plants that have very specific resource requirements
c. opportunistic plant species
d. plants that are pioneering and have slow rates of growth
C
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The obvious advantage of the lactose operon is that it
a. allows bacteria to survive in the presence of lactose. b. eliminates the need for lactose-metabolizing enzymes when lactose is not present. c. enables bacteria to make lactose only in the presence of the proper enzymes. d. negates the need for milk in the diet of adult humans. e. enables glucose to substitute for lactose in the diet of lactose intolerant persons.
What biome borders on boreal forest?
a. savanna c. tundra b. taiga d. chaparral
Rolling circle replication of DNA is characterized by the absence of
A) the DNA polymerase. B) a nick in the DNA template. C) the RNA primers. D) the replication bubble. E) the Okazaki fragments.
Sodium channels are concentrated in the
A) axon hillock and nodes of Ranvier. B) dendrites and synaptic boutons. C) dendrites and nodes of Ranvier. D) dendrites and axon hillock. E) synaptic boutons and axon hillock.