Plastics in the sea are a hazard to marine life because ________.
A. they ensnare animals
B. they are eaten by animals
C. they ensnare animals and they are eaten by animals
D. their colors confuse animals
E. they ensnare animals, they are eaten by animals, and their colors confuse animals
Answer: C
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How is the number of unpaired valence electrons in an atom related to the number of bonds that the atom can form?
A. The number of unpaired valence electrons in an atom is twice the number of bonds that the atom can form. B. The number of unpaired valence electrons in an atom is one-half the number of bonds that the atom can form. C. There is no defined relationship between the number of unpaired valence electrons and number of bonds that the atom can form. D. The number of unpaired valence electrons in an atom is the same as the number of bonds that the atom can form.
Which of the following is a correct IUPAC name?
A) 1-methylpropanal B) 2-methylpropanal C) 3-methylpropanal D) none of these
The ____ force is an apparent force created by Earth's rotation.?
a. ?pressure gradient b. ?Coriolis c. ?centripetal d. ?gravitational e. ?frictional
Trade winds are found ________
A) over most of Earth between 25° North and 25° South B) 25° of latitude north and south of the Arctic Circle C) centered on the longitudinal zone of the prime meridian D) north of the monsoon regions E) over all of the world's deserts