Trees do not have excess leaves in Summer,they have the number required to carry out their function.
Trees that lose their leaves in the Summer are usually dead.
a lot
plants,leaves,trees and more
Plants acquire more leaves during summer to decrease the rate of transpiration and increase the rate of photosynthesis to store food and water to save themselves from dehydration and dryness.
when Autumn stops and Winter start the trees get cold and have to grow more leaves
No
Deciduous trees like Oaks, Maples, Elms, etc. get their leaves back in spring.
What I think about the trees is that, they shed their over-grown and no-more useful leaves in the season of Autumn. This is how I think that trees get rid of their waste.
well, pine trees are a type of tree that keep their leaves all year round. pine trees have leaves that are almost more like little needles but not as sharp. we normally use pine trees as Christmas trees. there are probably other trees that don't lose their leaves as well, and I'm sure there are some that don't lose leaves until late Autumn or early winter. hope it helps :D Evergreens.
Formation of abscess layer at the base of petiole
No,They are always producing Oxygen.No. The more leaves the more oxygen.
Actually the leaves on some trees drop everywhere in fall (not just in the eastern US) and the leaves on other trees never drop.The trees that drop their leaves in fall are called deciduous and the trees that never drop their leaves are called evergreen.The reason for the phenomenon you are describing is that in the eastern US forests have many more deciduous trees than evergreen trees, while in the western US forests have many more evergreen trees than deciduous trees. But forests on both sides of the US always have some of both types.Deciduous trees drop their leaves in fall mostly as a way to minimize water loss in winter to the cold dry air. Evergreens have an entirely different means of coping with cold dry air in winter.
The needle-like leaves and scale-like leaves help the coniferous trees by conserving water loss with the wax coating. The also give the tree more surface area for photosynthesis.
Ans.Because the process of Photosynthesis is triggered by the sun. The sun is stronger in summer and the temperatures are warmer - the cells metabolisim is increasedGreen is the most efficient color for absorbing light, hence maximising the amount of light captured by chlorophyll for photosynthesis.