Which of the following would be considered an essential criterion for "life"?

a. accurate replication
b. heterotrophy
c. metabolism
d. multicellularity
e. A and C


Answer: e. A and C

Biology & Microbiology

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The scientist who published On the Origin of Species by Means of Natural Selection in 1859 was

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Which of the following antimicrobial agents is the most toxic to humans?

A) 70% alcohol B) ethylene oxide C) quaternary ammonium compounds D) chloramines E) iodophors

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When epinephrine binds to its G-protein linked receptor ____ is activated producing ___.

A. phospholipase C, diacylglyceride B. kinase, calcium C. kinase, transcription factor D. enzyme linked receptors, protein kinase E. adenylyl cyclase, cAMP

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The recent appearance of antibiotic-resistant strains of bacteria is an example of

A) the action of memory cells. B) evolution by natural selection. C) natural immunity. D) inflammation.

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