After Kingdom, what is the next taxon by which organisms are grouped?
a. class
b. order
c. genus
d. family
e. phylum
e
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Which of the following are considered decomposer mesofauna?
A) bacteria B) earthworms C) millipedes D) mites
You pick up a box of Cheerios cereal in the supermarket. The Nutrition Facts panel tells you that a 1-cup serving provides 25 percent of the ______ for iron.
Fill in the blank(s) with the appropriate word(s).
When choosing a restriction enzyme for use in recombinant DNA technologies, it is often preferred that the enzyme generate cohesive, or "sticky," ends. Why is this preferred?
A) The sticky ends stick to the purification medium making the fragments easier to purify. B) The sticky ends do not have hydrogen bonds to help in re-annealing the cut DNA. C) The sticky ends prevent the DNA from re-annealing to any DNA. D) The sticky ends have hydrogen bonds that help re-anneal the cut DNA. E) The sticky ends make the DNA bind tighter to any cut DNA.
The direct Coombs' test is designed to detect when people have a disease that causes them to
a. have an excessively high fever. b. quit making antibodies. c. make too many red blood cells. d. produce antibodies that bind to their own red blood cells.