Biology Chap 7 (7.1 - 7.2) Question Preview (ID: 7375)
Cell Structure And Function.
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1665, Englishman used compound microscope to look at cork. Called what he saw (tiny, empty chambers) \
a) Aton van Leeuwnhoek
b) Theodor Schwann
c) Matthias Schleiden
d) Robert Hooke
1674, used a single-les microscope to observe pond water. Saw tiny living organisms, even in drinking water.
a) Rudolph VIrchow
b) Anton van Leeuwenhoek
c) Robert Hooke
d) Theodor Schwann
Cell Theory
a) All living things are composed of cells
b) All of the other three answers
c) New Cells are produced from existing cells
d) Cells are the basic units of structure and function of living things
basic units of life
a) nucleus
b) DNA
c) molecule
d) cells
Uses a pencil-like beam of electrons which is scanned over the surface of a specimen. Does not have to cut specimens into thin slices.
a) scanning electron microscopes (SEM)
b) transmission electron microscope (TEM)
c) none of the answers
d) Electron Microscope
makes it possible to explore cell structures and large protein molecules. Because beams of electrons cannot pass through thin samples, cells and tissues must be cut first.
a) microscope
b) transmission electron microscope (TEM)
c) electron microscope
d) scanning electron microscope (SEM)
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a) a
b) b
c) c
d) d
test not finished
a) a
b) b
c) c
d) d
test not finished
a) a
b) b
c) c
d) d
test not finished
a) a
b) b
c) c
d) d
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