If the genus Quercus (oaks) is monophyletic, then this means that all species of oaks
A. grow in similar habitats.
B. are morphologically very similar.
C. are descended from a common ancestor.
D. cannot be classified in a single family or order.
E. have undergone horizontal gene transfer sometime in their evolutionary history.
C. are descended from a common ancestor.
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Triglycerides are composed of three fatty acids attached to a molecule of ________.
Fill in the blank(s) with the appropriate word(s).
Herbivory benefits _____
a. the herbivore c. both the herbivore and the plant b. the plant d. neither the herbivore nor the plant
Clostridium tetani, the bacterium that causes tetanus, can survive in soil for up to 40 years. Forming which of the following structures would support its longevity?
A. a glycocalyx B. a pilus C. a cell wall D. an endospore E. a cell membrane
Thymine is used in DNA despite the fact that it is energetically more expensive to synthesize than uracil because
A) spontaneous deamination reactions convert cytosine to uracil at a fairly high rate. B) uracil is more sensitive to ultraviolet (UV) damage. C) uracil is more susceptible to depurination. D) uracil can only bind with ribose, not deoxyribose. E) thymine is less likely to undergo spontaneous deamination than uracil.