The activation of proteinase inhibitor genes occurs
A. before the systemin moves through the phloem of the plant.
B. in the cytoplasm of the affected cells.
C. in the nucleus of the affected cells.
D. in anticipation of a physical wound to the plant.
E. on the plasma membrane of the affected cells.
Answer: C
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To increase the proportion of auxotrophic mutants in a population of bacteria, one may use
A. direct selection. B. replica plating. C. penicillin enrichment. D. individual transfer.
Which is a likely result of a mass extinction?
a. The creation of “empty niche spaces,” which can stimulate radiation of surviving groups. b. The elimination of non-beneficial alleles from gene pools. c. The increase in the rate of new mutations in remaining species. d. The decrease in the rate of new mutations in remaining species. e. The introduction of mutations that have a greater than usual effect.
The concept proven by the experiment in this figure
is that a. protein is not the encoding material. b. protein enters the host cell. c. protein denatures due to radiation. d. protein is composed of subunits with phosphate. e. all of these are correct.
The form of infection with Entamoeba histolytica that is frequently asymptomatic is known as (extraintestinal/dysentery/luminal) amebiasis
What will be an ideal response?