Multiple choice

Growth of cells that cause the plant stem to bend towards light is due to the unequal distribution of

  1. auxins

  2. enzymes

  3. cytokinin

  4. gibberellic acid
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A Correct answer
Explanation

This option is correct because auxins are a class of plant growth substances and morphogens (often called phytohormone or hormone). Auxins have an essential role in coordination of many growth and behavioural processes in the plant's life cycle.

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