The biosphere (from Greek βίος bíos "life" and σφαῖρα sphaira "sphere") also known as the ecosphere (from Greek οἶκος oîkos"environment" and σφαῖρα), is the worldwide sum of all ecosystems. It can also be termed the zone of life on Earth, a closed system (apart from solar and cosmic radiation and heat from the interior of the Earth), and largely self-regulating.[1] By the most general biophysiological definition, the biosphere is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, geosphere, hydrosphere, and atmosphere. The biosphere is postulated to have evolved, beginning with a process of biopoiesis (life created naturally from non-living matter, such as simple organic compounds) or biogenesis (life created from living matter), at least some 3.5 billion years ago.[2][3]
In a general sense, biospheres are any closed, self-regulating systems containing ecosystems. This includes artificial biospheres such as Biosphere 2 and BIOS-3, and potentially ones on other planets or moons.
biosphere life exsists and extends from the depths of the oceans to the summit of the mountains
Deforestation is people cutting down whole forests of trees, andmaking it even less likely for humans to survive. Trees supplyoxygen, absorb carbon dioxide, and hold down the soil from washingaway or making landslides. The destruction and cutting down of forests is often done to clearland for farming, mining, roads, and grazing of cattle. That causesincreased atmospheric CO2 levels, a factor in global warming. The Cutting down and clearing of trees The action or process of clearing forests_ also _The state ofhaving been cleared by forests. Verb. To Clear of Forests or trees . The conversion of forested areas to non-forested lands. e.g. Cutting down a forest to make pastures. the cutting down of trees is called deforestation Deforestation means clearing of forests and using that land forother purposes. defforestation is cutting of trees. deforestation is when rain forests get destroyed and ruined 1. The state of being clear of trees 2. The removal of trees Deforestation occurs to create open space for urban or agricultural use.
Epithelial tissue. This type of tissue is made up of cells that are closely packed and arranged in one or more layers. Epithelial tissues cover internal and external body surfaces. They have a high regenerative capacity.and has many functions including, protection, absorption, secretion, sensation and excretion.
<span>Frog's tongues are attached to the front of their mouths rather than at the back like humans. When a frog catches an insect it throws its sticky tongue out of it's mouth and wraps it around its prey. The frog's tongue then snaps back and throws the food down its throat.</span>
