When an atom's outer electron shell is filled, the atom is ____

a. unstable
b. positively charged
c. polarized
d. most stable
e. isotope


ANSWER: d

Biology & Microbiology

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Hearing loss results from prolonged exposure to sound over ________

A) 85 dB B) 100 dB C) 60 dB D) This has not yet been determined.

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If a tree has flower petals that are small and the same color as its leaves, it is likely to be pollinated by

a) the wind. b) butterflies. c) moths. d) bees. e) bats.

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Carbon cycling works by

a) interaction with hydrogen and oxygen cycles b) returning CO2 from respiration to the atmosphere c) fixing CO2 in photosynthesis d) all of the above are correct

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Ricin is a potential chemical warfare agent that kills by disabling the ribosomes. With ricin poisoning, a cell would no longer be able to make ________

Fill in the blank(s) with correct word

Biology & Microbiology