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Science and Nature Quiz for 6 July 2011

A new science quiz is available each week. Try our daily general knowledge quiz or work through our archive of daily and themed quizzes.

Question 1: Sheep are aged by their teeth and are referred to by the number of permanent incisors that have erupted. About how old is a "four-tooth"?

A
1.5 to 2 years
B
1 to 1.5 years
C
2 to 4 years
D
2 to 3 years