Type S Streptococcus pneumoniae bacterium is lethal and will kill its host. If heat inactivated the S strain dies and becomes nonlethal. Type R Streptococcus pneumoniae is a nonvirulent strain of bacteria. What would occur if one were to inject both the R strain and heat-killed S strains into a host organism such as the mouse?
A. The S strain would be transformed into the nonvirulent R strain and kill the host.
B. The R strain would be transformed into the virulent S strain and kill the host.
C. The S strain would be transformed into the nonvirulent R strain and not affect the host.
D. The R strain would be transformed into the virulent S strain and not affect the host.
E. Neither the S nor the R strain would change.
B. The R strain would be transformed into the virulent S strain and kill the host.
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The first complete plant genome to be sequenced was that of ____
a. Phaseolus vulgaris (kidney bean) b. Arabidopsis thaliana (thale cress) c. Zea mays (corn) d. Capsella burse-pastoris (shepherd's purse) e. Oryza sativa (rice)
Differential media result in which of the following observable characteristics?
A. Gas bubbles B. Differently colored colonies C. Different media color after incubation D. Chemical precipitates E. All of the choices are correct.
If ATP accumulates in a cell
A) the cell receives a signal that there is a need for more energy. B) feedback inhibition speeds up cellular respiration. C) feedback inhibition slows down cellular respiration. D) the rate of cellular respiration does not change.
The driving force behind the evolution of the human mind has been primarily due to pressures stemming from
A. navigating a larger territory. B. interacting with other minds. C. tracking resources scattered across space and time. D. the last Ice Age