Electrons are ejected from atoms in cells when organisms are exposed to
A. ethyl alcohol.
B. ultraviolet light.
C. gamma rays and X-rays.
D. hydrogen peroxide.
E. dessication.
Answer: C
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Tortoises colonizing the different Galàpagos islands and evolving into different species is an example of speciation.
A. postzygotic B. sympatric C. prezygotic D. allopatric E. parapatric
Nonsteroid hormones bind to a receptor on the cell membrane of target cells but do not actually enter the target cells.
a. true b. false
The source of benzene as a chemical pollutant is ________
A) wood preservative B) petroleum products C) pulp and paper bleaching D) rubber compounds E) plastic manufacturing
In step 7 of the citric acid cycle, fumarase catalyzes the addition of a water molecule to a carbon–carbon double bond (see Panel 13¬–2). Can this be considered an oxidation reaction? Explain your answer
What will be an ideal response?