iv) একটি প্রাকৃতিক পলিমারের উদাহরণ দাও।
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Answer:
Natural polymers occur in nature and can be extracted. They are often water-based. Examples of naturally occurring polymers are silk, wool, DNA, cellulose and proteins.
Explanation:
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Explanation:
a-broad leaves b-needle like leaves c-scale leaves d-no leaves
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