Which of the following methods involves counting the number of organisms in a specific area?

a.

mark/recapture

b.

direct observation

c.

sampling

d.

indirect observation

The answer is C. The method which involves counting the number of organism in a specific area is sampling. It is one common method to estimate the population of certain organisms used by biologists. In a given range, the number of plot is determined and per plot the number of individuals is multiplied to the number of plots then this results to an approximate population size.