A plant requires potassium for

Options :
  1. holding its cells together
  2. synthesizing chlorophyll
  3. DNA replication
  4. opening and closing its stomata


Answer and Explanation :-

Answer: Option 4

Explanation:

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Seen politically, systems follow one another, each consuming the previous one. They live on ever-bequeathed and ever-disappointed hope, which never entirely fades. Its spark is all that survives, as it eats its way along the blasting fuse. For this spark, history is merely an occasion, never a goal.
-Ernst Jünger Eumeswil