The planet Mercury is closer to the sun than the planet Venus. However, temperatures on Venus are hotter than temperatures on Mercury. Why would this be the case?
A) Mercury has a thicker atmosphere than Venus that blocks heat from the sun.
B) Mercury spins more quickly than Venus, so its surface cannot heat up as quickly.
C) Venus has a thicker atmosphere than Mercury that traps heat from the sun.
D) Venus is cooled by high concentrations of water vapor in its atmosphere.
C
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Which one of the following species is endangered by human activity but not yet extinct?
A. the dodo B. the dusky seaside sparrow C. the African white rhinoceros D. the carrier pigeon E. the Bali tiger
By the mid-1980s, spring ozone thinning over Antarctica was so pronounced that people were referring to the lowestozone
region as a(n) __________. Fill in the blank(s) with the appropriate word(s).
The most common causative agent of acute endocarditis is ________.
A. Staphylococcus aureus B. Neisseria gonorrhoeae C. Streptococcus pyogenes D. Epstein-Barr virus E. Streptococcus pneumoniae
Which of the following genetic abbreviations denotes a male human?
a. 23, XX b. 46 XX c. 23, XY d. 46, XY