The type of skeleton that consists of fluid constrained within a layer of flexible tissue is a(n)

A. vascular canal.

B. endoskeleton.

C. gastrovascular cavity.

D. exoskeleton.

E. hydrostatic skeleton.


E. hydrostatic skeleton.

Biology & Microbiology

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Your research project involves characterizing the expression pattern of a nuclear pore protein. After using immunohistochemistry to fluorescently label the protein, you decide that you would like to capture the data as a 3-D image. Which microscope should you use?

A. confocal microscope B. scanning electron microscope C. phase-contrast microscope D. fluorescence microscope

Biology & Microbiology

The Earth's surface releases __________ that is absorbed by the atmosphere, stabilizing or raising atmospheric temperature.

A. fire B. ultraviolet radiation C. near-ultraviolet radiation D. activation energy E. long-wave infrared radiation

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Ocean productivity is not: a. the amount of food marine organisms can produce

b. a leading field of research. c. the amount of organisms actually harvested each year by people. d. the number of organisms the ocean can support.

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What type of endocytosis allows cells to "drink" (take up tiny droplets of extracellular fluid)?

a) exocytosis b) pinocytosis c) phagocytosis d) by means of clathrin-coated pits e) transcytosis

Biology & Microbiology