Exam-style question
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A field of potato plants has several discrete clusters of plants with blackened stems, while other areas are unaffected. What does this pattern most strongly suggest?.
- A.A field-wide irrigation failure affecting all plants equally.
- B.Spread of a pathogen from several infection points.
- C.Sun scorch due to unusually hot weather at midday.
- D.Every plant is genetically identical.
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