Human eye color is an example of a trait that varies ____
a. according to the geographical area
b. periodically
c. according to humidity
d. continuously
e. according to seasons
ANSWER: d
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Which of the following statements regarding the phosphorus cycle is incorrect?
A. The phosphorus pool is in sedimentary rock. B. Phosphorus must be phosphatized to enter biological systems. C. Phosphorus is released naturally by mining. D. Phosphorus mineralization occurs by microbial action. E. Thiobacillus produces sulfuric acid that dissolves phosphate rock.
A complete virus particle is called a
A. virion. B. nucleocapsid. C. capsid. D. cell.
Imagine that you are trying to make a homemade salad dressing and place several drops of olive oil into a container of water. You stir the solution, but the oil doesn't readily mix
Instead, you observe a glistening clump of oil floating on the surface. Explain what is happening at the molecular level. (Your answer should include the term hydrophobic.)
Virulence determinants of Helicobacter pylori include which of the following?
A. Motility B. Urease enzyme C. Adhesions D. all of the above are correct