MCQ
Biological control of pests is:
- APolluting
- BHighly expensive
- CSelf perpetuating
- DToxic
Explanation:
The biological method is the technique in which there is the use of living microorganisms or their product for the control of pests.
This method uses the microbes which act as predators or enemies of the target pest species.
The biological control method is often relatively inexpensive because the method uses microorganisms that can be easily cultured.
They do not contribute the pollution.
If biocontrol agents are introduced in any area, they can survive for multiple years and are capable of continuing or renewing themselves indefinitely i.e. become self-perpetuating.
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$I.$ The transfer of energy from producers to top consumers through a series of organisms is called food chain
$II.$ A food chain is always straight and proceeds in a progressive straight line
$III.$ In a food chain, there is unidirectional flow of energy from sun to producers and subsequently to series of different types of consumers
Which of the statements given above are correct?