The horizontal transfer process known as transduction
A) involves a virus.
B) requires a pilus.
C) requires a cell to be "competent."
D) requires a plasmid.
E) involves a mutagen.
A
Bloom's Taxonomy: Comprehension
Section: Genetic Recombination and Transfer
Learning Outcome: 7.29, 7.32
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Enrichment cultures can be established by placing the inoculum into selective media and incubating under specific conditions
Indicate whether the statement is true or false.
Suppose an individual is heterozygous for alternate alleles of gene A (Aa). Under what conditions would a crossover in a somatic cell of this individual lead to a clone of cells that are homozygous for a? (Pick the most precise answer.)
A) The crossover would have to occur between the A locus and the centromere and involve two homologous (nonsister) chromatids. B) The crossover would have to occur between the A locus and the end of the chromosome and involve two homologous (nonsister) chromatids. C) The crossover would have to occur between the A locus and the end of the chromosome and involve two nonhomologous chromosomes. D) The crossover would have to occur between the A locus and the centromere and involve two sister chromatids.
The cuticle in plants helps in preventing:a
dessication. b. transpiration. c. diffusion of gases. d. translocation of food. e. translocation of minerals.
A hot, dry summer will reduce crop yields in part because
A) carbon dioxide release is reduced by the stomata closing to prevent excessive water loss. B) carbon dioxide uptake is reduced by the stomata closing to prevent excessive water loss. C) oxygen uptake is reduced by the stomata closing to prevent excessive water loss.