1a) Using the two pics of the 30 shells total, record and tally for each shell in which whorl (turn) of the shell the predation drill hole is located. The body of whorl of the shell, with the opening, should be whorl #1 and the very tip of the spire would be whorl 10.

1b) Make a bar graph from the tall data of the 30 shells. What patterns can be seen from the data?

1c) Why was the bar graph chosen to show the data?
 
 

AU ///