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What is the natural role of nicotine in tobacco plant?

it is poisonous to insects

it attracts bees

it is an useless by-product

it moisturizes leaves

Nicotine is a powerful neurotoxin to insects. Many plants other than tobacco contain it, however the concentration of nicotine in tobacco is exceptionally high. Even though some species have evolved the ability to feed on tobacco, it remains relatively easy to grow, being unpalatable to most species. In some places, tobacco became an invasive weed.

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What is the effect of nicotinic acid on human organism?

It is harmful, causes cancer

It is highly toxic, kills in 10 seconds

It is essential for functioning

Who became the first country in the world to introduce plain packaging for cigarettes?

What enema was used to treat many diseases in the 17th-19th centuries?

salt solution enema

liquid soap enema

tobacco smoke enema

Which plant is hazardous to harvest when it is wet?