Question

Why leaves fall from the tree when they turn in yellow?

Answer 1

tree leaves turns yellow because all the useful products and ions migrates from leavesvto stem parts........
this is a annual process in trees
thus every year tree leaves turns yellow and leaves fall down...

i hope it will help you

Answer 2

Plants prepare themselves for winter season when level of sunlight received will be low and water content of soil will also be low. As a result water supply to peripheral parts seizes. Also chloroplast disappears.That is why leaves fall after turning yellow.