Unit Test — Cumulative exam Answers

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21
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Which statement describes the valence electrons in metallic bonds?

A
They are shared equally between two atoms.
B
They are shared unequally between two atoms.
C
They are shared among many atoms.
D
They are transferred from one atom to another.
22
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How is the development of the cell theory by Matthias Schleiden and Theodor Schwann an example of multiple approaches yielding the same result?

A
Both researchers reached the same conclusion by performing each other’s experiments.
B
Both researchers reached the same conclusion but at different times.
C
Both researchers reached the same conclusion by studying different organisms.
D
Both researchers reached the same conclusion by reviewing previous research.
23

A researcher is collecting qualitative data pertaining to social behaviors of deer at different times of the day. How will she most likely need to organize this data?

A
in a pie graph
B
in a bar graph
C
in a line graph
D
in a data table
24

Juana performs the calculation below.6.05 + 3.156 + 5.0How should she report the answer using the correct number of significant figures?

A
14.206
B
14.21
C
14.2
D
14
25

Over time, human beings have evolved characteristics that give them advantages and promote their survival in various environments. Which set of characteristics evolved to benefit humans over other animals?

A
complex brain, opposable thumbs, toolmaking
B
complex brain, opposable thumbs, strength
C
complex brain, running speed, toolmaking
D
opposable thumbs, sharp vision, sensitive hearing

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