maruti

  In   botany , a   tree   is a   perennial plant   with an elongated   stem , or   trunk , usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with   secondary growth , plants that are usable as   lumber   or plants above a specified height. In wider definitions, the taller   palms ,   tree ferns ,   bananas , and   bamboos   are also trees. Trees are not a  monophyletic taxonomic group  but consist of a wide variety of plant species that  have independently evolved  a trunk and branches as a way to tower above other plants to compete for sunlight. The majority of tree species are  angiosperms  or hardwoods; of the rest, many are  gymnosperms  or softwoods. Trees tend to be long-lived, some trees reaching several thousand years old. Trees evolved around 370 million years ago, and it is estimated...