Passage I

Snow crab (Chionoecetes opilio) is a subarctic species of crab that is commercially fished in the Atlantic Ocean. Because snow crab are eaten by fish such as cod, the number of cod present in an area may affect snow crab populations. The figure below shows the mass of snow crab caught on the eastern Scotian Shelf in the Atlantic Ocean each year from 1980 through 1994. The figure also shows, for the same area, the estimated number of 1-to 3-year-old cod and the estimated number of 4- to 6-year-old cod present each year from 1980 through 1994.

1. According to the figure, the estimated number of 1-to 3-year-old cod present in 1980 was approximately:

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

Look at the curve of 1- to 3-year old cod in the figure. Note that there are two different vertical coordinates on the left and right in this picture. Because the question stem asks about estimated number, so look at the ordinate on the right. When the abscissa is 1980, the ordinate corresponding to this curve is about 1000000