According to the passage, biological agents usually consist of _________.
insects and microorganisms
various types of mammals
Correct Answer: GET
Knowledge: Reading comprehension
According to the passage, biological agents usually include .
B. insects and microorganisms
C. a variety of mammals
Information: Therefore, scientists are exploring the innate weed-killing powers of living organisms, preeminent insects and microorganisms.
(As a result, scientists are exploring the innate ability of living organisms to kill weeds, mainly insects and microorganisms.)