Which of the following includes most of the bacteria that cause human disease?

a. chemoautotroph
b. chemoheterotroph
c. photoautotroph
d. photoheterotroph
e. chemoautotroph and photoheterotroph


B

Biology & Microbiology

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Which pair diverged longer ago from their common ancestor and why?

When comparing the sequences of a homologous gene in four different species, one pair of species shows a 1% difference, whereas the other pair shows a 3% difference. A. The pair with a 1% difference; because a lower difference (1% instead of 3%) has occurred because the common ancestor is younger and more mutations occurred over a shorter amount of time. B. The pair with a 1% difference would have an older common ancestor; A higher difference (1% instead of 3%) has occurred because the common ancestor is older and there has been more time to accumulate mutations. C. The pair with a 3% difference would have an older common ancestor; A lower difference (3% instead of 1%) has occurred because the common ancestor is younger and there has been more time to accumulate mutations. D. The pair with a 3% difference would have an older common ancestor; A higher difference (3% instead of 1%) has occurred because the common ancestor is older and there has been more time to accumulate mutations. E. None of these are correct.

Biology & Microbiology

What is the defining characteristic of the Opisthokonts?

a. archaic forms of plastids b. pseudophodia c. single posterior flagellum d. calcium carbonate shells

Biology & Microbiology

Runners are modified stems that resemble roots and are also known as ____.

A. stolons B. rhizomes C. bulbs D. corms E. tubers

Biology & Microbiology

Haldane pointed out that if he received a certain allele, the chance that one of his brothers would receive that allele would be

A. Random B. 50% C. 0% D. 100% E. 10%

Biology & Microbiology