Charles Darwin and his son Frances discovered that a grass seedling bends towards light only if the

Options :
  1. stem is at least 10 cm long
  2. tip of the coleoptile is present and exposed to light
  3. cotyledon is present and exposed to light
  4. night s are long in comparison with the days
Answer and Explanation :-

Answer: Option 2

Explanation:

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There is more in you of good than you know, child of the kindly West. Some courage and some wisdom, blended in measure. If more of us valued food and cheer and song above hoarded gold, it would be a merrier world.
-J.R.R. Tolkien The Hobbit