The nitrogenous waste material of an embryo that accumulates inside the eggshell of a bird or reptile is
A. urea.
B. amino acid.
C. uric acid.
D. ammonia.
E. uracil.
Answer: C
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Which greenhouse gas is released by bacteria engaged in anaerobic metabolism?
a. nitrous oxide b. carbon dioxide c. methane d. ozone
In mapping the HD gene associated with Huntington disease, eventually researchers narrowed down their hunt to four candidate genes within the mapped region. How did they identify one of these as the definitive HD gene?
What will be an ideal response?
After a trip to several South American countries, a middle-aged man becomes ill. He becomes anemic, loses weight, and runs a fever. The clinician notes a recently healed sore near his nose. Microscopic examination of a blood smear does not reveal anything other than the anemia. What parasitic infection is consistent with this scenario?
A. malaria B. leishmaniasis C. Chagas' disease D. giardiasis E. balantidiasis