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Chemical Defenses

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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
1. 3 answers
2. asked by aden
3. 186 views
Which detail was left uncertain in the articleHowever, when underdressed by pests, such as when ants destroy the roots, plants
1. 3 answers
2. asked by Tanya
3. 22 views