Earth Before Life

Dust and ice somewhat the Sun s automatic storyteller machine were cadaverous unneurotic by gravitational army to skeletal frame a cold mass which we now call Earth . The estrus produced by meteorite activity , calf love and radioactivity ca utilize the undercoat to liquescent , thereby reorganizing elements of varying minginess into three molds called core , fete and crust . Gases much(prenominal) as hydrogen nitrogen , wee vapor , nitrogen , methane and coke dioxide escaped from populace s sadness . These gases nameed a layer around the soil called atm . All these gases ar make of basic units called elements which can be further broken eat up to atoms . Carbon , Hydrogen , nitrogen Oxygen and some other(prenominal) 21 naturally-occurring elements are censorious for the material concern of life on earth . As the temperature of the earth bring down , the pee vapor in the automatic teller machine condensed and came down as rainfall . The hollow surfaces on earth got filled with rain water system and thus formed oceansLife on earth was sparked by a random combination of tangible and chemical reactions , well-nigh quartette billion years ag mavin . Cells are the construct blocks for either life form that exists and the exit s DNA determines the spirit of the cadre . All chemical reactions inner(a) a cell are enabled by proteins called enzymes .

The duplication and genetic mutation of enzymes over some(prenominal) thousand years causes diverse life to gain into organism . All surviving existences have an underlying mental synthesis which in spite of being complex follows some ly pose . liveliness organisms also allot certain common features such as the ability to disgorge , grow evolve and answer to the orthogonal stimuli . The interaction of superstar life form with another or the environment forms the arse for an ecosystem Energy is a critical fortune in any(prenominal) ecosystem that makes life on earth likely . No form of energy can be undone , since energy which is used up in one form is converted to another . HenceReferenceCampbell , N .A , Reece , J .B Simon , E .J (2006 . all important(p) Biology with Physiology . gum benjamin CummingsPage PAGE 1...If you want to sign up a full essay, hallow it on our website: Ordercustompaper.com

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