Which of the following will prevent the further buildup of greenhouse gases?
a. Choose furniture made from exotic hardwoods.
b. Use your automobile less, and ride a bicycle more.
c. Produce more waste that goes to landfills.
d. Buy an air conditioner that uses chlorofluorocarbons.
e. Buy an automobile with poor fuel-efficient.
b
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In a broad sense, the role of a confidence interval for the population mean is meant to accurately portray what?
A. Different population distributions have different population means. B. The uncertainty involved with observing a sample and not the entire population. C. If you take a random sample, the sample mean is a biased estimate of the population mean. D. None of the answers is correct.
Domestication results from __________ selection, rather than __________ selection
a. natural; artificial b. artificial; natural
What was the basis on which prokaryotes were split into two domains?
a. according to differences in cell membrane properties b. according to differences in cell wall composition c. according to differences in staining characteristics d. according to differences in rRNA sequences
Which macromolecule did the majority of scientists favor as the "first" to be found in protobionts?
A. DNA. B. RNA. C. Amino acids. D. Proteins.