A botanist observes that the leaves of tomato plant A are beginning to wrinkle and mottle. Plant B, which sits directly next to plant A, appears healthy.
What experiment might help determine whether virus X is causing plant A’s leaves to wrinkle and mottle?


After infecting plant B with virus X, if its leaves also begin wrinkling and mottling, this evidence would support the hypothesis that it is virus X that is causing the wrinkling and mottling in plant A’s leaves.

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