According to the food chain concept, it takes ________ kilograms of plankton to make one kilogram of weight gain for a human.
A) 1
B) 10
C) 100
D) 1,000
E) 1,000,000
Question 2
Biomagnification is most closely associated with ________.
A) elephants
B) ozone
C) carbon dioxide
D) DDT
E) loud birds