Multiple choice

Leaf fall will occur when the contents of:

  1. auxins are increased

  2. auxins are decreased

  3. gibberellins are decrease

  4. gibberellins are increase
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Leaf abscission occurs when auxin production decreases, which happens naturally as leaves age or under stress conditions. The drop in auxin triggers the formation of the abscission layer at the leaf base, weakening the connection and causing leaf fall.

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