Question:
Which of the following is NOT given as an advantage of using biological agents over chemical herbicides?
-
A.
They are less likely to destroy desirable plants. -
B.
They are safer for workers. -
C.
They are more easily available. -
D.
They don’t have to be used as often.
Reference explanation:
Correct Answer:
Knowledge: Reading comprehension
Explain:
Which of the following is NOT given as an advantage of using biological agents over chemical herbicides?
A. They are less likely to kill the desired vegetation.
B. They are safer for workers.
C. They are more available.
D. They do not have to be used very often.
Information:
– They can be chosen for their ability to attack selected targets and leave crops and other plants affected.
(Biological agents are chosen for use because of their ability to attack selected targets and exclude planted plants and other plants they do not touch.)
– Furthermore, a number of biological agents can be administered only once, after which no added applications are needed.
(Plus, many biologics can be used just once, after which no further treatment is required.)
– The biological agents now in use are environmentally benign and are harmless to humans.
(Biological agents are environmentally friendly and harmless to humans.)
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