Concentrations of CFCs in the upper atmosphere are currently:
a. rising dramatically
b. leveling off
c. declining sharply
d. undetectable
e. rising slowly
b
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Which of the following statements regarding the gene FoxP2 is NOT true?
A. FoxP2 is a member of a large family of evolutionarily conserved transcription factors that play an important role in development. B. Individuals (humans) with mutations in FoxP2 often have problems with speech and language. C. A "molecular clock" analysis of the FoxP2 gene in chimpanzees and humans strongly suggests that the evolution of novel function in FoxP2 of humans led to the evolution of language. D. FoxP2 is involved in the development of many tissues, so it must have plieotropic effects (or "additional functions that are independent of language ability").
Evolution, viewed on a small scale, as it relates to changes in a single gene or allele frequency in a population over time, is called
A. macroevolution. B. speciation. C. genetic evolution. D. phenotypic evolution. E. microevolution.
Gram-negative bacteria
A. appear purple following the Gram stain. B. include all pathogens. C. are generally more susceptible to antibiotics than gram-positive bacteria. D. have a more complex cell envelope with a greater variation in chemical composition.
Single-stranded DNA molecules are said to be antiparallel when they are lined up next to each other but oriented in opposite directions.
a. true b. false