It's useful because it highlights structures in biological tissue.
3 atoms! Glad I can help! :)
Nitrogen is often used for the storage of semen samples for artificial insemination of cattle. Nitrogen is used to maintain a dry inert atmosphere over chemicals during storage, reaction or processing. Used in brewing, soft drinks and wine-making industries to exclude air from the product and de-aerate water.
<h2><u>Answer</u> : - </h2>
Polywool fibre is <u>synthetic</u>.
⇒b. Synthetic
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