Please choose the best answer to the following questions.

1.			If the history of the universe were reduced to a single year, our species show up around
			A)	January 6.
			B)	March 15.
			C)	September 8.
			D)	December 31.
2.			The event that sparked the beginning of the universe is known as the
			A)	Big Bang.
			B)	Large Thump.
			C)	Bulky Smash.
			D)	Considerable Boom.
3.			Galaxies began to form around
			A)	5 bya.
			B)	8 bya.
			C)	12 bya.
			D)	20 bya.
4.			In Australia there are fossils of single-celled organisms, from at least 2.8 bya, that were capable of
			A)	walking.
			B)	photosynthesis.
			C)	producing gametes.
			D)	All of the above.
5.			Multicellular organisms first appeared about
			A)	5 bya.
			B)	3.8 bya.
			C)	2 bya.
			D)	1.7 bya.
6.			About 1 bya, some organisms began to reproduce
			A)	asexually.
			B)	sexually.
			C)	via photosynthesis.
			D)	via replication.
7.			What does the term “Cambrian explosion” refer to?
			A)	The rapid evolution of complex multicellular organisms.
			B)	The meteor crash that wiped out the dinosaurs.
			C)	The event that set off the beginning of the universe.
			D)	The mega earthquake that divided the continents.
8.			Plate tectonics account for which of the following geological phenomena?
			A)	earthquakes
			B)	volcanoes
			C)	mountain building
			D)	All of the above.
9.			Pangea is
			A)	an organism with a backbone.
			B)	a molecule that does not contain carbon.
			C)	the supercontinent that included parts of all present-day continents.
			D)	the movement of the plates of the earth’s crust.
10.			The earth may be losing species at a rate of ____ a year.
			A)	100
			B)	7,000
			C)	13,000
			D)	27, 000