Which list correctly orders the events leading to leaf fall in deciduous trees?
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 correct order of events leading to leaf fall in deciduous trees is first the shortening of days, which triggers an increase in ethylene production. This leads to the formation of an abscission layer, which eventually causes the leaf to detach from the tree. There is no significant decrease in auxin levels associated with leaf fall.

Which List Correctly Orders the Events Leading to Leaf Fall