Which type of microscopy utilizes lasers that scan across a fluorescently-stained specimen and a computer that focuses
the light to give sharp 3D images?
a. confocal laser scanning microscopy
b. phase-contrast microscopy
c. bright field microscopy
d. scanning electron microscopy
e. fluorescence microscopy
ANSWER: a
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In aquatic systems, which of the following are highly
resistant to low DO levels in the sediment? a. stoneflies and mayflies b. carp and goldfish c. Tubifex worms d. ducks and geese e. none of these
Of the molecules found in membranes, which demonstrate dual solubility characteristics?
a. proteins, ions, and glycolipids b. proteins, phospholipids, and glycolipids c. proteins, sterols, and ions d. proteins, sterols, and phospholipids
Endocrine communication depends on
A) chemicals secreted into the blood for delivery. B) chemicals secreted through ducts. C) cytoplasmic movement through gap junctions. D) electrical signals within individual cells. E) target cells not binding to a hormone.
T lymphocytes mature in the (bone marrow/lymph node/thymus)
What will be an ideal response?