The cells of an aging animal function less efficiently because
A) organelles and cellular components decline.
B) protein synthesis ceases.
C) damaged DNA cannot be repaired.
D) cell metabolism is slower.
E) cells can no longer mitotically divide.
C
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The Army and the Environmental Protection Agency
are decreasing the contamination at the Army’s Aberdeen Proving Grounds by a. removing contaminated soil. b. planting hybrid poplar trees. c. chemically degrading the contaminants. d. covering the contaminated soil with a sealant. e. doing none of these.
In order for a community to reach the status of climax community, succession must always begin with pioneer species.
Answer the following statement true (T) or false (F)
The sample standard deviation is related to the sample variance through what functional form?
A. Logarithm B. Exponential C. Square root D. Linear
A functional group added to a hydrocarbon usually makes the hydrocarbon:
A) polar. B) nonpolar. C) acidic. D) an isomer. E) hydrophobic.