Match the following items with the correct phrases.

_______1. The number of nanometers in a micrometer.
_______2. The resolving power of the compound light microscope is __________ times better than the resolving power of the unaided eye.
_______3. The number of micrometers in a millimeter.
_______4. The resolving power of the transmission electron microscope is __________ times better than the resolving power of the scanning electron microscope.
_______5. The resolving power of the transmission electron microscope is __________ times better than the resolving power of the unaided eye.

a. 10
b. 100
c. 1,000
d. 1,000,000
e. 1,000,000,000


1. c. 1,000
2. c. 1,000
3. c. 1,000
4. b. 100
5. d. 1,000,000

Biology & Microbiology

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A characteristic that an organism displays is called __________

A. a gene B. a chromosome C. DNA D. gene expression E. a trait

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Which group includes mammals, birds, and reptiles but excludes all other chordates? 

A. Vertebrates B. Amniotes C. Tetrapods D. Monotremes E. Deuterostomes

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There is a __________ flow of energy into and out of

an ecosystem, and a cycling of materials among resident species. Fill in the blank(s) with the appropriate word(s).

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Electrical impulses are transmitted between components of the central nervous system via which one of the following?

A) glial cells B) motor neurons C) sensory neurons D) interneurons E) macrophages

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