You have been studying population growth of a species of Paramecium, a single
celled organism for 18 days. Your data are shown in the graph below. Food was
occasionally added to the test tube in which the paramecia were grown.
Grow
According to the diagram, what is the carrying capacity of the
test-tube environment as long as food is added?
A. about 10 paramecia
B. about 50 paramecia
C. about 65 paramecia
D. about 100 paramecia