Soon after the introduction of antibiotics, resistant strains of bacteria that could grow in the presence of particular antibiotics began to evolve. Researchers develop new antibiotics, only to see resistant bacterial strains evolve within a few years. Which of the following explains why resistant strains of bacteria can evolve so quickly?
A. Bacteria have a short generation time.
B. Bacteria can transfer plasmids containing resistance genes via conjugation.
C. Horizontal gene transfer.
D. Bacteria have a short generation time and can transfer plasmids containing resistance genes via conjugation.
E. Bacteria have a short generation time and can transfer plasmids containing resistance genes by horizontal gene transfer mechanisms such as conjugation.
E. Bacteria have a short generation time and can transfer plasmids containing resistance genes by horizontal gene transfer mechanisms such as conjugation.
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Canine phosphofructokinase (PFK) deficiency afflicts Springer spaniels, affecting an estimated 10% of the breed. Given its critical role in glycolysis, one implication of the genetic defect resulting in PFK deficiency in dogs is _____
A) early embryonic mortality B) elevated blood-glucose levels in the dog's blood C) an intolerance for exercise D) a reduced life span
If C is dominant to c, what fraction of offspring will show the recessive phenotype when two heterozygous parents are
crossed? a. 0/4 b. 1/4 c. 2/4 d. 3/4 e. 4/4
A blood test cannot determine if a person is a carrier of Tay-Sachs disease because the mutant allele is undetectable
a. True b. False
________ means "sugar splitting."
Fill in the blank(s) with correct word