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Science and Nature Quiz for 13 December 2017

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: What does commensalism between two organisms imply about them?

A
One benefits while the other is harmed
B
Both benefit from each other
C
One is harmed while the other is unaffected
D
One benefits from the other without affecting it