In Griffith's experiments, what happened when heat-killed S-strain bacteria were injected into a mouse along with live R-strain bacteria?
A) Proteins released from the heat-killed S-strain killed the mouse.
B) DNA from the live R-strain was taken up by the heat-killed S-strain, converting them to R-strain and killing the mouse.
C) DNA from the heat-killed S-strain was taken up by the live R-strain, converting them to S-strain and killing the mouse.
D) RNA from the heat-killed S-strain was translated into proteins that killed the mouse.
C
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What effect does increasing gene flow between two populations have on their genetic makeup?
What will be an ideal response?
Superweeds result from
A. cross-pollination of cultivated and non-cultivated plants in the field. B. cross-pollination of cultivated and non-cultivated plants in the laboratory. C. cross-pollination of two cultivated plants in the field. D. cross-pollination of two cultivated plants in the lab. E. cross-pollination of two non-cultivated plants in the field.
Environmental stochasticity refers to random variations in birth and death rates occurring in populations from year to year
Indicate whether the statement is true or false
If the concentration of solutes in a cell is less than the concentration of solutes in the surrounding fluid, then the extracellular fluid is said to be:
a. stable. b. isotonic. c. hypotonic. d. hypertonic. e. amphipathic