Tree | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-23

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Tree


00:02:46 1 Definition
00:04:40 2 Overview
00:09:23 3 Distribution
00:12:33 4 Parts and function
00:12:43 4.1 Roots
00:17:04 4.2 Trunk
00:21:35 4.3 Buds and growth
00:24:02 4.4 Leaves
00:26:26 4.5 Reproduction
00:27:09 4.6 Seeds
00:30:29 5 Evolutionary history
00:32:24 6 Tree ecology
00:34:32 7 Uses
00:35:32 7.1 Food
00:40:01 7.2 Fuel
00:41:43 7.3 Timber
00:43:38 7.4 Art
00:44:02 7.4.1 Bonsai
00:45:33 7.4.2 Tree shaping
00:46:47 7.5 Bark
00:49:06 7.6 Ornamental trees
00:50:26 7.7 Other uses
00:52:28 8 Care
00:53:14 9 Mythology
00:56:03 10 Superlative trees
00:58:10 11 See also



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SUMMARY
=======
In botany, a tree is a perennial plant with an elongated stem, or trunk, supporting branches and leaves in most species. 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. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a woody trunk and branches as a way to tower above other plants to compete for sunlight. Trees tend to be long-lived, some reaching several thousand years old. In wider definitions, the taller palms, tree ferns, bananas, and bamboos are also trees. Trees have been in existence for 370 million years. It is estimated that there are just over 3 trillion mature trees in the world.A tree typically has many secondary branches supported clear of the ground by the trunk. This trunk typically contains woody tissue for strength, and vascular tissue to carry materials from one part of the tree to another. 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 anchor 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 light energy and convert it into sugars by photosynthesis, providing the food for the tree's growth and development.
Trees usually reproduce using seeds. Flowers and fruit may be present, but some trees, such as conifers, instead have pollen cones and seed cones. Palms, bananas, and bamboos also produce seeds, but tree ferns produce spores instead.
Trees play a significant role in reducing erosion and moderating the climate. They remove carbon dioxide from the atmosphere and store large quantities of carbon in their tissues. Trees and forests provide a habitat for many species of animals and plants. Tropical rainforests are among the most biodiverse habitats in the world. Trees provide shade 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 land available for agriculture. Because of their longevity and usefulness, trees have always been revered, with sacred groves in various cultures, and they play a role in many of the world's mythologies.