How was the mechanism of sympatric speciation among hemp nettles in nature verified experimentally?
a. By simply creating unique hybrids under laboratory conditions
b. By producing hybrids that were 98% fertile under laboratory conditions
c. By producing experimental hybrids that could reproduce successfully with both parent species
d. By producing experimental hybrids that formed fertile offspring with the naturally occurring hybrid
e. By creating hybrids that reproduced through the F4 generation before dying from hybrid inviability
d
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In allosteric control, activity of the enzyme is regulated by an ________ binding to the ________
a. enzyme / allosteric site b. activator / active site c. activator or inhibitor / allosteric site d. inhibitor / active site
Which of the following statements is correct concerning the current regulation of genetically modified
foods by the FDA? A. They are not allowed for human consumption. B. They are allowed in plant products but not in animal products. C. They are allowed in animal products but not in plant products. D. Labelling of genetically modified foods is not required. E. Only genetically modified food grown in the USA is allowed.
How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?
0 because mRNA has only anticodons 6 27 9 3
If Na+ levels were depleted in the extracellular fluid, rate of glucose movement would
A. decrease. B. stay the same. C. increase.