Streptolysin O is
A. Oxygen stable is antigenic
B. Oxygen labile and antigenic
C. Oxygen labile and non-antigenic
D. Oxygen stable and non-antigenic
Answer: B. Oxygen labile and antigenic
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As sand moves rapidly down the continental slope it can lead to:
a. convergence. b. earthquakes. c. turbidity currents. d. shelf breaks. e. midocean ridges.
Alternative RNA processing generates different mRNAs that can direct the synthesis of different polypeptides
Indicate whether the statement is true or false
Phil is conducting a seed germination experiment. He places three groups of lettuce seeds in a 34º Celsius incubator with adequate moisture. One set of seeds is placed in a dark area with no light source. A second set is placed under artificial light, and third set of seeds is placed in direct sunlight. This experiment is intended to test Phil's hypothesis that light is necessary for lettuce seed germination.Based on the experimental design, which variable was the dependent variable?
A. germination rate B. type of light C. seeds in the dark D. moisture E. temperature
Natural selection occurs when there is nonrandom elimination of genotypes from a population due to ________
A) decreased predation B) similarities in viability or reproductive success C) differences in reproductive isolation mechanisms D) differences in viability or reproductive success