Because some tress have a longer life span then others, and want to keep them, but some just fall off and die.....
The easy answer to that is evergreen leaves! It's not that simple though, for instance some trees manage to keep their dead leaves over winter and some deciduous trees keep their leaves over winter.
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.
No they don't. What kind of trees are coniferous? It means, cone bearing. So, the most familiar kind of cone on a tree is the pine cone. What kind of leaves do pine trees have? They have needles, very narrow leaves that do not drop off in the fall, but stay on all year. Some conifers, such as the Larch, drop their leaves in the Autumn, but they do not have large broad leaves.
Yes some plants have leaves which fall of like mango leaves . But there are some plants of which leaves do not fall , like oak leaves.
Trees. The leaves *fall from the trees in autumn. That's why some people call it *fall instead of autumn.your friend,----- Bucky Badger of WISCONSIN
Evergreen trees keep their leaves the year round. Some evergreens are broadleaf trees, and some conifers. And likewise with deciduous trees. Teak trees lose their leaves in the dry season. So you see it is quite variable.
Most deciduous trees lose their leaves in Autumn . . . trees like maples, linden trees, elm trees; however, oddly enough, many oak trees do not lose their leaves in Autumn. The leaves turn colors, and then die and turn brown. The dead leaves take their time to drop off. In my area, some oaks still have their dead leaves as late as early Spring.
Coniferous trees are cone bearing. Deciduous trees drop their leaves in the Autumn. Some conifers are deciduous.
All trees will withstand winter, as they are many years old. Some trees shed their leaves in winter. They are deciduous. Trees that keep their leaves are called evergreen.
The word deciduous means to fall off. Therefore trees from which leaves drop at some point of the year (autumn) are called deciduous.
Most trees in Florida are evergreen and keep their leaves year-round. However, some deciduous trees, like cypress and red maple, can be found in certain parts of the state and may shed their leaves in the fall.
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.