Unlike many other animals, sponges lack
a. a digestive tract.
b. a symmetrical body plan.
c. nerve cells.
d. larvae.
e. all of these EXCEPT “larvae.”
Answer: e
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Four of the five choices listed below are therapeutic
measures applied to affected individuals. Select the exception. a. prenatal diagnosis b. chemotherapy c. surgical correction d. diet modification e. hormone replacement therapy
Allergic reactions to penicillins are considered a(n) ________ hypersensitivity.
A. Both T-cell-mediated and antibody-mediated are correct. B. immune complex-mediated C. immediate D. T-cell-mediated E. antibody-mediated
The evolution of aquatic vertebrates that could live on land likely involved an intermediate species that
A) could fly. B) had a single lung. C) had a tracheal system of branching internal tubes. D) had both gills and lungs.
Describe the two forces that drive an ion across the plasma membrane and explain how the Nernst equation takes into account both of these forces
Use the components of the equation to support your explanation and be sure to specify the assumptions being made when using the Nernst equation to calculate membrane potential.