Practice!

Sample Problem

Which of the following words can be used to describe mutualism?

(A) symbiotic

(B) commensal

(C) beneficial

(D) intraspecific

Solution

(A) and (C) are correct. Mutualism is a form of symbiosis that is beneficial to both organisms. (B) commensal is the adjective form of commensalism, which is a different symbiotic relationship. (D) intraspecific means within a species. Mutualism is interspecific.