alleryA substance broken down by biological processes is:
ACrystalline
BNon-biodegradable
CSynthetic only
DBiodegradable
Answer & Solution
Correct answer: D. Biodegradable
1. Biodegradable matter is acted on by saprotrophic microbes.
2. Examples: vegetable waste, paper, cotton cloth.
3. Non-biodegradable matter (plastics, glass) resists biological breakdown.
_Source: syllabus Science, Ch 13 "Our Environment", §13.2.2_
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