Through What Process Do Deciduous Plants Drop Their Leaves

Question

Through what process do deciduous plants drop their leaves?
A) thigmotropism
B) gravitropism
C) abscission
D) photoperiodism

Accepted Answer

Deciduous plants drop their leaves through the process of abscission. This is a natural process where the plant intentionally sheds its organs (leaves) as a result of seasonal changes or hormonal changes. This is why deciduous plants lose their leaves in autumn and winter, while evergreen plants keep their leaves all year round. Thigmotropism is the response of plants to touch, while gravitropism is the response of plants to gravity. Photoperiodism is the response of plants to the length of day and night. None of these processes are related to leaf shedding.