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What is the effect of nicotinic acid on human organism?

it is neutral
It is harmful, causes cancer
It is highly toxic, kills in 10 seconds
It is essential for functioning
Nicotinic acid, better known as niacin or vitamin B3, has nothing in common with tobacco. Chronic lack of niacin leads to pellagra, a vitamin deficiency disease.
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it is neutral
It is harmful, causes cancer
It is highly toxic, kills in 10 seconds
It is essential for functioning
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0%
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8%
66%
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8%
24%
7%
59%
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8%
58%
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11%
5%
58%
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30%
6%
56%
30
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39%
0%
50%
113
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10%
30%
10%
50%
10
flagBelarus
5%
38%
11%
44%
18
flagCanada
10%
40%
6%
43%
30
flagthe United Kingdom
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46%
11%
35%
159
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33%
9%
33%
21
flagthe Netherlands
20%
20%
30%
30%
10
flagPoland
4%
52%
12%
29%
10422
flagthe United States
6%
50%
13%
28%
418
flagMalaysia
8%
40%
24%
28%
25
flagAustralia
4%
41%
24%
26%
41
flagIndia
4%
49%
19%
24%
370
flagRepublic of Ireland
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57%
28%
14%
14
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6%
68%
12%
12%
16
flagthe Philippines
17%
58%
13%
6%
29

Which plant is hazardous to harvest when it is wet?

cotton
grapes
tobacco
sunflower

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

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

salt solution enema
spirits enema
liquid soap enema
tobacco smoke enema

Where does the name K2 come from?

name of Polish climber - Jerzy Kukuczka
the fact it's second in height in the world
name of the Karakoram Range
the name "King George II"