In botany, a tree is a plant with an elongated stem Essay Example for Free

In botany, a tree is a do with an elongated stem seeIn some usages, the definition of a tree may be narrower, including solely woody plants, merely plants that are usable as lumber, only plants preceding(prenominal) a specified height or only perennial species. At its broadest, trees include the taller palms, the tree ferns, bananas and bamboo.A tree typically has umteen secondary branches back up clear of the ground by the trunk. This trunk typically contains woody tissue for strength, and vascular tissue to stretch materials from one part of the tree to an other(a). For most trees it is surrounded by a layer of bark which serves as a protective barrier. Below the ground, the roots branch and spread out widely they serve to backbone the tree and extract moisture and nutrients from the soil. Above ground, the branches divide into smaller branches and shoots. The shoots typically bear leaves, which capture firing energy and convert it into chemical energy by photosynthes is, providing the food needed by the tree for its step-up and development.Flowers and fruit may also be present, but some trees such as conifers instead bemuse pollen cones and seed cones, and others such as tree ferns produce spores instead.Trees tend to be long-lived,1 some reaching some(prenominal) thousand years old. The tallest known specimen on Earth is 115.6 m (379 ft) and they have a theory-based maximum height of 130 m (426 ft).2 Trees have been in existence on the Earth for 370 trillion years. Trees are not a taxonomic group but are a number of plant species that have independently evolved a woody trunk and branches as a way to tower above other plants and make full use of the sunlight.Trees play a significant role in diminution erosion and moderating the climate. They remove carbon dioxide from the atmosphere and store large quantities of carbon in their tissues. Trees and forests generate a habitat for many species of animals and plants. Tropical rainforests are o ne of the most biodiverse habitats in the world. Trees provide pure tone and shelter, timber for construction, fuel for cooking and heating, and fruit for food as well as having many other uses. In parts of the world, forests are shrinking as trees are cleared to increase the amount of overthrow available for agriculture. Because of their longevity and usefulness, trees have always been revered and they play a role in many of the worlds mythologies.