What kind of bacterial variant would be most likely to survive in the human digestive system?
A) a variant that thrives at temperatures close to 100°C
B) a variant with a coating that is resistant to an acidic environment
C) a variant that reproduces slowly
D) a variant that easily attaches to hard surfaces
B
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The term "theory" used by a scientist means
What will be an ideal response?
_____ form a waterproof seal between cells
a. Tight junctions c. Gap junctions b. Adhering junctions d. all of these
Fasciola hepatica is a
A. filarial worm. B. liver fluke. C. blood fluke. D. lung fluke. E. roundworm.
In experiments with laboratory populations of Drosophila melanogaster, Mukai and Burdick (1959 ) observed that a lethal allele maintained a higher than expected frequency
The explanation for this observation is that, at equilibrium, the selective advantage of the lethal allele when it occurs in heterozygotes balances the disadvantage of the allele in homozygotes, and is termed ________. A) equilibrium distribution B) underdominance C) allelic frequency dependence D) overdominance E) terminal dominance