Explain the significance of the 1950s experiments of F. C. Steward.
What will be an ideal response?
F. C. Steward was able to induce differentiated carrot cells to form an entire carrot plant. This was evidence that even differentiated cells still possessed all of the genetic material needed for the differentiation of entire plants.
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When measuring membrane potential, the tip of a microelectrode is inserted into a(n)
a. axon. b. node of Ranvier. c. Schwann cell. d. dendrite. e. glial cell.
The main purpose of preparing karyotypes is to ____
a. prepare for gene extractions b. determine gender c. determine which genes are on which chromosomes d. separate DNA into its component parts e. diagnose or rule out certain genetic disorders
In large random mating populations, random genetic drift is usually a significant factor in changing gene frequencies
Indicate whether the statement is true or false
S. aureus has been isolated from George's infected wound. To satisfy Koch's postulates, what would George's doctor need to do with the isolated S. aureus?
a. Inject the S. aureus strain into an animal and see whether it develops the same type of infection that George has. b. Compare the DNA sequence of the strain of S. aureus isolated from George to other S. aureus strains to see whether it has been isolated from other similar infections. c. Inject the S. aureus into an animal, observe whether the animal gets an infection similar to George's, and isolate the same strain of S. aureus from the infection. d. Inject the S. aureus into an animal; if the animal develops the same infection, isolate the infectious material from the animal and test its ability to vaccinate another animal.