Editing Life
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[[File:Happy_People_Photograph_by_Karthikeyan_KC.jpg|thumb|right|300px| Life on Earth.]] | [[File:Happy_People_Photograph_by_Karthikeyan_KC.jpg|thumb|right|300px| Life on Earth.]] | ||
Life is a biological entity that is indigenous to a biological system that can reproduce, transform energy, grow and regulate itself in a sustainable environment as found on [[Earth]]. The common characteristic traits of a system with life are homeostasis, metabolism and reproduction. A life can be of a single living system like a cell, or a group of living system making a sophisticated biological living system like Homo sapiens. | Life is a biological entity that is indigenous to a biological system that can reproduce, transform energy, grow and regulate itself in a sustainable environment as found on [[Earth]]. The common characteristic traits of a system with life are homeostasis, metabolism and reproduction. A life can be of a single living system like a cell, or a group of living system making a sophisticated biological living system like Homo sapiens. | ||
| − | == Frequently Asked Questions == | + | ==Frequently Asked Questions== |
| − | === Why life exists only on Earth? === | + | ===Why life exists only on Earth?=== |
| − | In our solar system, Earth is supposed to be the only habitable zone that can sustain life at the time of this writing. When the whole [[universe]] is considered, there may be similar planetary systems like the Solar system with habitable planets that can sustain life. However, Earth is the only planet we have observed | + | In our solar system, Earth is supposed to be the only habitable zone that can sustain life at the time of this writing. When the whole [[universe]] is considered, there may be similar planetary systems like the Solar system with habitable planets that can sustain life. However, Earth is the only planet we have observed life on. |
| − | === Why life is carbon based? === | + | |
| + | ===Why life is carbon based?=== | ||
[[Carbon]] is one of the abundant elements along with [[Hydrogen]], [[Helium]], [[Nitrogen]], and [[Oxygen]]. Carbon has four [[valence electrons]], making it as the versatile element to bond with four new elements and form stable and complex molecules and macromolecules that are essential for life. | [[Carbon]] is one of the abundant elements along with [[Hydrogen]], [[Helium]], [[Nitrogen]], and [[Oxygen]]. Carbon has four [[valence electrons]], making it as the versatile element to bond with four new elements and form stable and complex molecules and macromolecules that are essential for life. | ||