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.
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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
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
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.
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