When direct examination of virioplankton is carried out by transmission electron microscopy, the numbers obtained are reported as ________.

A. particulate organic matter
B. viral potential
C. plaque-forming units
D. virus-like particles


Answer: D

Biology & Microbiology

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In life cycles that alternate between haploid and diploid stages, fertilization doubles the number of chromosomes per cell while ______ reduces it in half.  

A.  mitosis B.  meiosis C.  binary fission D.  syngamy

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Allof the following evidence supports the RNA world hypothesisexcept:

A. RNA can function as a genome. B. An RNA component of ribosomes catalyzes the synthesis of proteins. C. RNA can serve a structural role. D. RNA stabilizes membranes. E. RNA regulates gene expression.

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The difference between people who handle stress

well and those who become deeply depressed is based on all BUT a. polygenic inheritance. b. genes and the environment. c. a transporter protein that moves serotonin into brain cells. d. a gene product that counters anxiety. e. a gene mutation.

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A lichen results from the mutualistic relationship between fungi and which of the following?

A) cyanobacteria or algae B) green plants C) heterotrophic bacteria D) protozoans

Biology & Microbiology