Question

How can we know whether a tree is alive or not?

Answer 1

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One of the best ways to determine if a tree or any plant is dead is the tree scratch test. Just beneath the dry, outer layer of bark in a tree's trunk lies the cambium layer of bark. In a living tree, this is green; in a dead tree, it is brown and dry

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Answer 2

the leaves because they will be droopy and brown dead and if its alive the leaves will be healthy lookin