Which Aspect of Ecology Would an Ecologist Be Likely to Study

Multiple Choice

Which aspect of ecology would an ecologist be likely to study today that an ecologist 150 years ago would not have studied?

A) The effect of human sewage on stream biodiversity
B) The natural history of caddis fly larvae in a stream
C) The classification of all species of stream organisms
D) The comparison of species found in shallow streams and deep pools
E) The population size and growth rate of trout populations