Why do field researchers work with tribal healers in their search for new rainforest drugs

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Explanation:

Drugs are obtained from plants. The rainforest zone has abundance of a variety of plant species due to the plentitude of rainfall all year round.

Many of these plants have known medicinal properties and have been used by tribal healers to cure diverse ailments.

Field researchers need to work closely with these tribal healers to identify plant species with observed medicinal properties. These plant species are now studied scientifically and the active ingredients in them are extracted and used to produce new potent drugs.