jrmg2009

The formation of the UNIVERSE is explained through what theory?-was born of the observation that other galaxies-10 billion to 20 BYA-a massive blast allowed all the universe's known matter and energyeven space and time themselvesto spring from some ancient and unknown type of energy.

trillion-trillionth of a second (after the BB)universe expanded:pebble-size origin to astronomical scopeexpansion continued

Georges Lematre 1920s single primordial atomEdwin Hubblegalaxies are speeding away from us in all directionsArno Penzias and Robert Wilsoncosmic microwave radiation

original cause of the big bang itself

EVENT 1: Formation of the UNIVERSE

THE FORMATION of the SOLAR SYSTEM is triggered by what event?

cloud of gas and dust in space was disturbedexplosion made waves in space which squeezed the cloud of gas and dustSqueezing made the cloud start to collapse, as gravity pulled the gas and dust together, forming a solar nebulacloud grew hotter and denser in the center, with a disk of gas and dust surrounding it that was hot in the center but cool at the edgesas the disk got thinner and thinner, particles began to stick together and form clumps.

4.6 to 4.5 byadisk-shaped cloud of subsidiary smaller lumps, pieces, dust, gases, Coalesced and condensedEarth began as a cold world HOTFirst atmosphere: hydrogen gasfirst real ATMOSPHEREvolcanic activity and chemical reactionsH2O, CO2, CO, N2, NH3 H2, Nitrogen

EVENT 2: Formation of the EARTHAir compositionEarly atm

EVENT 4: Formation of small units

CO2 Carbon dioxide CO Carbon monoxide H2O Water N2 Nitrogen CH4 Methane NH3 Ammonia

Name the two SCIENTISTs that independently HYPOTHESIZED the abiotic formation organic compounds essential to LIFE.

ABIOTIC SYNTHESIS of small organic moleculesamino acids and nucleotides1920s: Alexander Ivanovich Oparin and JBS John Burdon Sanderson HALDANEindependently postulated that conditions on the PRIMITIVE earth favored chemical reactions that synthesized organic compounds from inorganic compounds

Name the SCIENTISTS that had performed the EXPERIMENT to test OPARANs and Haldanes HYPOTHESIS.

EVENT 5:Formation of MacromoleculesOparin-HaldaneMiller-UreyExperiments

Lab SIMULATIONS of the EARLY EARTH conditions produced organic polymers.

PROTEINOIDSPolypeptides from abiotic means

CLAY concentrates A.A. And other ORGANIC COMPOUNDSW/ binding sitesW/ MEATL ATOMS Fe and ZnC.S.: clays might have been the first templates for self-replicating systemsPyriteCharged surface

What do you call the AGGREGATES of ABIOTICALLY produced molecules that CANT REPRODUCE precisely?Can MAINTAIN an INTERNAL environmentCan METABOLIZE and can be EXCITED

EVENT 6:Macromolecules to Pre-CELLSProteinsPolysaccharidesNucleotidesLipids and FatsCELL-likestructures composed of these Macromolecules

EVENT 7: Formation of Pre-CELLS

WHAT is PROBABLY the FIRST GENETIC MATERIAL???-short polymers of RIBONUCLEOTIDES have been produced ABIOTICALLY in the laboratory-1980: THOMAS CECH-revolution thinking about the evolution of life when they discovered that RNA molecules are IMPORTANT CATALYSTS in modern cells-RIBOSOMES use RNA CATALYTS: rRNA, tRNA and mRNA-capable of self replication

EVENT 8: Pre-CELLS to Living CELLS

5 Descriptions of FIRST LIFEUnicellularAsexually reproducingAquatic environmentRNA containingheterotrophic

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