Which of the following is recognized as a microbe capable of nitrification?

A. Hyphomicrobium spp.
B. Purple nonsulfur bacteria
C. Red photosynthetic bacteria
D. Nitrosomonas europaea


Answer: D

Biology & Microbiology

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Endosymbiosis of cyanobacteria is widely accepted as an explanation for the development of chloroplasts.  The presence of endosymbiotic cyanobacteria provided a cell with the advantage of ________.

A. a membrane-bound nucleus B. tolerance to oxygen C. an electron transport chain D. simple, rapid gene transfer E. photosynthesis

Biology & Microbiology

True or false: When two populations have undergone allopatric speciation long enough to be unable to produce fertile offspring, then they are different enough to be considered two different species

A. true B. false

Biology & Microbiology

The relationship between strands of RNA and DNA

is a. antagonistic. b. opposite. c. complementary. d. an exact duplicate. e. unrelated.

Biology & Microbiology

Hawaiian fruit flies descend from a single common ancestor that reached the islands and rapidly diversified into a wide range of ecological niches. This is a good example of ________. [two words]

Fill in the blank(s) with correct word

Biology & Microbiology