To which phylum does the American black bear (Ursus americanus) belong?
a. Mammalia
b. Carnivora
c. Chordata
d. Ursidae
e. Ursus
ANSWER: c
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Nitrifying Thaumarchaeota outcompete nitrifying bacteria in many aquatic and terrestrial environments because Thaumarchaeota
A) are well-adapted to high salinity and extreme UV irradiation. B) are well-adapted to temperature extremes. C) are well-adapted to very low nutrient and electron donor concentrations. D) have very resistant specialized cells that survive long periods of dehydration and nutrient starvation.
the appendix is a part of the _____ intestine
What will be an ideal response?
Suppose that a scientific idea is well-tested and can be used to make predictions in numerous new situations, but cannot explain one particular event. This idea is a
A) theory that may need revision. B) hypothesis that must be retested. C) hypothesis that is incorrect. D) theory that should be discarded.
Starch, cellulose, and glycogen are alike in that they
A. have the same types of bonds between the monomer units. B. can all be digested by our bodies. C. contain the same number of side chains. D. are all made of glucose. E. are all found in animals.