Atoms in which the number of electrons does not equal the number of protons are known as:

A. valences.
B. ions.
C. isotopes.
D. isomers.


B. ions.

Biology & Microbiology

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Although Sulfolobus solfataricus grows at pH 2 to 4, it maintains a cytoplasmic pH of about 2, thereby generating a large pH gradient across the plasma membrane.

Answer the following statement true (T) or false (F)

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Both mitochondria and chloroplasts are thought to have evolved by the process of ____

a. endosymbiosis b. viral reassortment

c. transformation d. decomposition e. nitrogen fixation

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The __________ sensations arise from sensory

receptors located in skin, or near muscles or joints. Fill in the blank(s) with the appropriate word(s).

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Which of the following is TRUE of "starter cultures"?

A. They cause spoilage of foods. B. They are always naturally occurring in the foods being processed. C. They are preservatives and do not alter the food being processed. D. They are used to control the fermentation process. E. They are naturally occurring and cause food spoilage.

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