The ability of some rats to become resistant to Warfarin was due to ________
a. a gene for resistance
b. their ability to convert Warfarin to a non-toxic substance
c. the different blood clotting mechanisms present in rats
d. their ability to detect and avoid Warfarin
e. the decreased use of Warfarin in urban environments
a
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The __________ __________ model assumes that evolution occurs in spurts, between which there are long periods of stasis with little evolutionary change.
Fill in the blank(s) with the appropriate word(s).
Which muscle is the “calf muscle”?
a. gluteus maximums b. biceps femoris c. gastrocnemius d. sartorius e. quadriceps femoris
Plants in the desert-adapted families Cactacea (cactus) and Euphorbia (euphorbs) share many of the same physical characteristics, such as succulent stems that store water and CAM photosynthesis, but they do not share a recent common ancestor. This evidence suggests that these families are an example of
A. divergent evolution. B. convergent evolution. C. homologous structures. D. vestigial structures.
Which of the following is NOT an antimicrobial feature of the urinary system?
A) physiological valves found in the ureter B) pH of the urine C) flushing action of urine D) the use of the urethra for seminal fluid in women E) None of the answers is correct; all of these are antimicrobial features of the urinary system.