Triglycerides yield how much more energy, gram for gram, than carbohydrates?
a. twice as much
b. three times as much
c. four times as much
d. one half as much
e. about the same amount
A
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Once formed, B cells mature in the _____, while T cells mature in the _____
Fill in the blank(s) with correct word
Why do Rh-negative but not Rh-positive mothers sometimes have babies with hemolytic disease of the newborn?
A. This disease results when an Rh-negative mother's immune system is primed multiple times to produce anti-Rh IgG antibodies that can cross the placenta. If the mother is Rh-positive, she won't produce any anti-Rh antibodies at all. B. Rh-positive mothers produce IgM antibody, not IgG. This antibody can't cross the placenta, so it can't cause hemolytic disease of the newborn. C. Rh-positive mothers will receive a preventative shot from their physician prior to conception. This will provide the protection the fetus needs AFTER conception to avoid the disease. D. Rh-negativity is also associated with hyperproduction of antibodies. As such, Rh-negative mothers are more likely than Rh-positive mothers to produce the antibodies needed to produce this disease.
Similar body parts are not always homologous. They may have evolved independently in separate lineages as
adaptations to the same ____. a. reproductive isolation of these groups b. environmental pressures c. reduced genetic variability in these groups d. identical genes in all three groups
e. genetic bottleneckWhat is one advantage to using cladistics rather than phylogenetic systematics?
What will be an ideal response?