Atrazine
a. is an herbicide that has been in use for more
than 40 years.
b. application in the United States totals about
36 thousand metric tons annually.
c. is used mostly to kill weeds in cornfields.
d. contamination of soils and water is
common in the American Midwest.
e. fits all of these descriptions
E
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The above figure is a photograph of
a. plant with root nodules. b. mycorrhizae. c. root hairs. d. demonstration of the effect of mutualistic Rhizobium. e. a nodule forming around area where the bacterium infect.
The more cells divide, the more chances for a cancer to develop. Which of the following cells is most
likely to give rise to a cancer? A. Egg cells D. Mature skin cells B. Muscle cells E. Stem cells C. Nerve cells
What is the harm that can come from genetically modified crops?
What will be an ideal response?
What do all human males inherit from their mother?
A) mitochondrial DNA B) an X chromosome C) the SRY gene D) A and B only E) A, B, and C