Consider the following kinds of organisms:
1. Bacteria.
2. Fungi
3. Flowering plants
Some species of which of the above kinds of organisms are employed as biopesticides?
Correct Answer: Option D
Explanation
1. Biopesticides are derived from natural materials such as animals, plants, bacteria, and certain minerals. They are generally less toxic than conventional pesticides.
2. Statement 1 (Bacteria) is correct. Several bacterial species are used as biopesticides. The most well-known example is Bacillus thuringiensis (Bt), strains of which produce proteins toxic to specific insect larvae.
3. Statement 2 (Fungi) is correct. Various fungal species are employed as microbial biopesticides. Examples include entomopathogenic fungi like Beauveria bassiana and Metarhizium anisopliae (which infect insects) and antagonistic fungi like Trichoderma species (which combat plant pathogenic fungi).
4. Statement 3 (Flowering plants) is correct. Many flowering plants produce compounds that have pesticidal properties. Extracts from plants like Neem (Azadirachta indica), Chrysanthemum (source of pyrethrins), and tobacco are used to create botanical pesticides, which fall under the broader category of biopesticides.
5. Since species from all three kinds of organisms are used as biopesticides, the correct option includes 1, 2, and 3.
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