Which of the following pairs of articles does NOT represent nonbiodegradable substances?
Wooden bottle and wooden plate
Biodegradable substances are broken down by microorganisms such as bacteria and fungi into simpler, harmless substances. Nonbiodegradable substances cannot be broken down this way and stay in the environment for a long time.
Wood is a natural plant material made largely of cellulose, which bacteria and fungi can decompose. So a wooden bottle and a wooden plate are both biodegradable, and this pair does not represent nonbiodegradable substances.
Polythene, plastic jars, plastic bottles and plastic wrappers are synthetic polymers that microbes cannot decompose, and many synthetic fertiliser chemicals also persist in soil and water. So the other pairs are nonbiodegradable.
Hence, Wooden bottle and wooden plate.
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