Refer to the Figure Below Showing the Changes That Occur

question 221

Multiple Choice

Refer to the figure below showing the changes that occur when a leaf is about to fall from the stem. In this diagram, an abscission zone has formed.What does that mean for the plant?

• A) It has been exposed to red light, changing the shape of its phytochrome protein.
• B) It has been exposed to far-red light, changing the shape of its phytochrome protein.
• C) It has produced insufficient auxin for abscission to take place.
• D) Ethylene will trigger the plant to drop its leaves.
• E) Auxin will soon initiate fruit production.

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