Which of the following lists the events leading to leaf fall in deciduous trees in the correct order?
A)formation of abscission layer, increase in ethylene levels, decrease in auxin levels
B)shortening days, increase in ethylene production, formation of abscission layer
C)shortening days, formation of abscission layer, decrease in ethylene levels
D)decrease in ethylene levels, shortening days, formation of abscission layer

Question

Quizplus · Accepted Answer

The events leading to leaf fall in deciduous trees are initiated by shortening days, which signal the tree to increase its production of ethylene. This increase in ethylene production triggers the formation of the abscission layer, which severs the connection between the leaf and the tree. Therefore, option B, which lists the events in the correct order, is the best choice. Options A, C, and D have incorrect sequences of events.

Which of the Following Lists the Events Leading to Leaf