When an atom of water is irradiated it first dissociates into _____.
a) two water atoms
b) an ion pair
c) free radicals
d) hydrogen peroxide
Ans: b) an ion pair
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The role of environmental factors on gene
expression is illustrated by a. the varying plant height of genetically identical yarrow plants when grown at different elevations. b. the flower color of hydrangeas grown in soils of differing pH. c. the depression response that some persons make to very stressful situations. d. the fur pattern of Himalayan rabbits. e. all of these.
Which of the following questions CANNOT be answered by the scientific method?
a) does taking echinacea reduce the intensity or duration of the common cold? b) does chemical runoff give rise to hermaphrodite fish? c) does hair that is shaved grow back coarser? d) is eyewitness testimony in criminal proceedings reliable? e) which shakespearean sonnet is the most beautiful?
Oxygen-poor blood becomes oxygen-rich blood in the capillary beds of the
A. alveoli. B. bronchioles. C. larynx. D. bronchi. E. trachea.
In sweet peas, dominant alleles C and P are necessary for colored flowers. In the absence of either (__ pp or cc __) or both (cc pp), the flowers are white. A cross between a plant with colored flowers and a plant with white flowers that produced 38 plants with colored flowers and 42 plants with white flowers could be written as _______.
Fill in the blank(s) with the appropriate word(s).