Question

Which is the correct sequence in context with the least bio-degradable to most bio-degradable material?

• A. Bones, Plastic, Paper, Metal Can
• B. Paper, Metal Can, Bones, Plastic
• C. Plastic, Metal Can, Bones, Paper
• D. Plastic, Bones, Paper, Metal Can

Answer 1

The correct option is C Plastic, Metal Can, Bones, Paper

1. Microorganisms can decompose other living matter. But stronger chemical bonds between plastics cannot be broken by microorganisms.
   
2. Things that can be decomposed by microbes are called bio-degradable and things that cannot be decomposed by microbes are called non-biodegradable material.
3. Plastic cannot be decomposed by microbes due to its strong chemical bonds. Also, heavy metal and cans cannot be degraded by microbes thus they are non-biodegradable.
4. Of the 5 options, the paper and bones are derived from living matters thus can be easily decomposed by microbes. Hence, they are biodegradable.