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

Biology & Microbiology

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The evolution of aquatic vertebrates that could live on land likely involved an intermediate species that

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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.

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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

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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

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