What is unique about hydrothermal vents as an ecosystem? What will be an ideal response?
In every other ecosystem, the primary producers are photosynthesizers, turning light energy to
chemical energy. However, at hydrothermal vents chemoautotrophic organisms are the primary
producers of the ecosystems. Not only does this propose an alternative explanation for the origin of
life on Earth, but also proposes means by which life could exist on planets less hospitable to
photosynthesis.
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State the difference between a transgenic animal and a cloned animal.
What will be an ideal response?
A virulence factor common to many members of the Enterobacteriaceae which permits them to deliver harmful proteins directly to cells is
A. fimbriae. B. a glycocalyx. C. type III secretion system. D. pili. E. porins.
In a population with two alleles, B and b, the allele frequency of b is 0.4. What would be the frequency of heterozygotes if the population is in Hardy-Weinberg equilibrium?
a. 0.48 b. 0.16 c. 0.24 d. 0.60
Compare the structures of animal and plant cells. How are they different? How are they the same?
What will be an ideal response?