Because of genetic differences in people's responses to medications, there are over 100 different
types of
a. antibiotics.
b. muscle relaxers.
c. tranquilizers.
d. blood pressure medications.
e. stimulants.
D
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Tube feet of sea stars, erectile tissue of the penis in vertebrates, and the bodies of cnidarians are all supported by ____
a. an exoskeleton b. cardiac muscle c. a hydrostatic skeleton d. an endoskeleton e. joined exo- and endoskeletons
What would happen if the foramen ovale and ductus arteriosus failed to close?
1.The left side of the heart would serve no role.
2.No blood would go to the lungs.
3.The aorta would be damaged by the input of excessive blood.
4.The oxygen levels of the blood would drop.
In the last lab, you used the PHYLIP program to create unrooted phylogenetic trees. Why was it important to "root" the phylogenetic tree after you created it?
A. Unrooted trees are not necessary to the organisms you are trying to study B. In the unrooted trees the outgroup might not branch off prior to the common ancestor of the organisms under study C. In the unrooted trees the outgroup is not connected to the rest of the tree by a common ancestor D. Unrooted trees do not follow the Law of Parsimony
Antibiotic therapy very early in life can
a. cause a predisposition for IBD. b. cause a predisposition for allergies. c. cause increased weight gain. d. all of the above