In nature, a biofilm may include
a. bacteria only.
b. microscopic algae only.
c. fungi only.
d. protists only.
e. bacteria, microscopic algae, protests, and
fungi
E
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The work of Bartel's group on the ribozyme RNA replicase supports which conclusion?
A) An RNA world could produce molecules that could self-replicate. B) Natural selection requires human oversight. C) DNA must have come before RNA. D) Life cannot come from nonlife.
People who can taste PTC are more likely than non-tasters to dislike broccoli and Brussels sprouts
a. True b. False Indicate whether the statement is true or false
What is the maximum number of electrons in the second energy shell of an atom?
A. 8 B. 4 C. 32 D. 2 E. 18
The number and kinds of genes inherited by a population is called the
a. genotype. b. phenotype. c. gene pool. d. genetic drift. e. genetic variation.