TREE DISEASES AND PESTS
COMMON TREE DISEASES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Tannins are an example of what type of defence?
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Physical
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Passive Chemical
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Active Chemical
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None of the above
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Explanation:
Detailed explanation-1: -Tannins are complex chemical substances derived from phenolic acids (sometimes called tannic acid). They are classified as phenolic compounds, which are found in many species of plants, from all climates and all parts of the globe.
Detailed explanation-2: -Tannins are water-soluble high molecular weight polyphenolic compounds with an ability to bind to proteins, sugars, and starches forming strong chemical complexes stable at pH3.
Detailed explanation-3: -Tannins can be classified into two groups-hydrolyzable and condensed tannins.
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