FORESTRY
PLANT AND WOOD ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Black walnut trees produce a nontoxic chemical that becomes highly toxic when it is exposed to air or soil. How does this chemical help black walnut trees compete protect themselves from plants growing nearby or animals in the soil?
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By attracting herbivores to the other plants
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By poisoning animals or plants nearby.
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By increasing the photosynthesis rates in the other plants
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By limiting the amount of water available to the other plants
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Explanation:
Detailed explanation-1: -The fruit, leaves and roots of black walnut trees contain a chemical, juglone, that can have a devastating impact on the roots of other plants. In humans, ingesting even a small amount of pure juglone can cause a serious poisoning effect.
Detailed explanation-2: -Wilt. Yellowing of leaves. Stunted or slow growth. Death – sometimes within a few months of exposure. 10-Jun-2017
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