OnlineCBT
Biology · MICROBES IN HUMAN WELFARE
हिन्दीGiven below are two statements: Statement I: Bacillus thuringiensis spores are mixed with water and sprayed onto vulnerable plants like brassicas and fruit trees to kill insect larvae. Statement II: The bacterial spores themselves directly dissolve the plant vascular tissues to induce systemic immunity against pests. In the light of the above statements, choose the most appropriate answer from the options given below:
Correct answer · Option 3
Statement I is correct but Statement II is incorrect.
Explanation
Statement I is correct. Statement II is incorrect because Bt spores release insecticidal toxins only when ingested by insect larvae in their gut, not by dissolving plant vascular tissues.
