501 Critical Reading Questions

a
, 
d
, and 
e
are all distracters stemming from that confusion regarding con-
text. Because scrimshaw and enamel are wax-like substances, a
less careful reader may choose 
b
.
385.
d.
According to lines 21–22 of the passage, choices 
a
, 
b
, 
c
, and 
e
are all parts of the physical structure of teeth. Choice 
d
, 
tusk,
is
not a component of teeth, but rather a type of tooth found in
some mammals.
386.
d.
From the context in lines 13–17, it can be deduced that 
mastica-
tion
means the act of chewing because tusks, evolved from teeth,
501
Critical Reading Questions

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are described in line 16 as able to go 
beyond chewing.
Choices