After 5,730 years, we can predict that half the molecules of 14C will have been converted into ________

a. 14N
b. 32P
c. 12C
d. 60Co


a

Biology & Microbiology

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Dotting the abyssal plain are abyssal hills that rise up to:

a. 100 meters. b. 500 meters. c. 1000 meters. d. 1500 meters. e. 4000 meters.

Biology & Microbiology

Acid-fast organisms such as Mycobacterium tuberculosis contain ________ constructed from mycolic acids in their cell walls.

A. proteins B. peptidoglycan C. carbohydrates D. lipids

Biology & Microbiology

Four of the following might be a response to rising body temperature. Which one is the exception?

a. increased rate of breathing b. decreased secretion of certain hormones c. more sweat d. reduced blood flow to skin e. increased rate of breathing

Biology & Microbiology

Which of these is the best description of a virus?

A. an invasive cell B. a noncellular living organism C. the smallest bacteria known D. chemical complexes of RNA or DNA protected by a protein shell E. a member of the kingdom Virusae

Biology & Microbiology