Characteristics between the branch points of a cladogram that are shared by all organisms above the branch point and are not present in any below it are called
A. novel characters.
B. ancestral characters.
C. derived characters.
D. homologous characters.
E. homoplastic characters.
Answer: C
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Dr. Singh just returned from a year working in rural Africa for the World Health Organization, and now he has a small clinic in San Francisco. In both locations, he sometimes sees patients with chronic elevated IgE levels. Match the doctor's initial diagnosis for a patient in each location.
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the process of
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Which process involves antibodies covering surface receptors on a virus or toxin molecule, thereby disrupting their activity?
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