A diet rich in ___ has been shown to reduce the incidence of spina bifida
A. vitamin C
B. niacin
C. folate
D. vitamin D
E. vitamin E
C
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Flight muscles of birds connect bones of the upper limb to the ________
a. pelvic girdle b. radius c. sternum d. ulna
Different healthy individuals exhibit widely varying responses to the same microorganism due to ______ differences that influence their first, second, and/or third line immune defenses
Fill in the blank(s) with the appropriate word(s).
Which of these animals has the greatest proportion of long-looped nephrons in their kidneys?
A) A saltwater fish B) A freshwater fish C) A freshwater mammal, such as a beaver D) A human E) A desert mammal, such as a sand rat
The gene for human ABO blood type, for which three or more alleles persist in a population at a relatively high frequency, is an example of _______.
A. multiple allele system B. polygenic inheritance C. incomplete dominance D. epistasis E. continuous variation