The speed of light in a vacuum is 300,000,000 m/s. Represented in powers-of-10 notation, this is
a. 30 × 10^8m/s.
b. 3 × 10^7m/s.
c. 30 × 10^6m/s.
d. 3 × 10^8m/s.
d
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Coronae on Venus are believed to be
a. impact craters. b. caused by rising convection currents in the interior of Venus. c. the result of plate tectonics. d. located only in the polar regions of Venus. e. much older than the highlands such as Ishtar Terra.
Dark matter makes up 18.7% of the Universe
a. True b. False Indicate whether the statement is true or false
What was one reason that RNA was eventually replaced by DNA as the molecule of choice for storing genetic information?
A) the bases that make up DNA became much more common B) DNA is far more stable than RNA C) DNA can catalyze its own replication D) the double helix of DNA is better able to correct errors in replication
About 24,000 women in the United States ____ each year because of an STI they may not have even known they had.?
Fill in the blank(s) with the appropriate word(s).