ANSWER THE FOLLOWING LUFE ON EARTH - A TIMELINE4.6 BILLON YEARS AGOOrigin of the Earth from a swirlingdisk of gas, dust and debrissurrounding the infant sun.4 To 3.7 BILLON YEARS AGOABAUT 1.2 BILLION YEARS AGOFirst multi-celled organisms arethought to have appeared. Aroundthe same time, sex was invented.Life begins! Scientists believe it didn't take long after theinfant Earth cooled from a molten, asteroid-bombarded hellfor microbes to start spreading. Chemical evidence suggestslife had originated before 3.7 billion years ago. No one knowsexactly when it happened, or how it happened, but scientistshave devised some plausible scenarios by which complexmolecules organized themselves into something like DNA,which could start evolving through natural selection.5 BILION YEARS A4 RILLION YEARS AGO415 - 315 MILLON YEARS AGOInvasion of the land! First plants colonized the continents,then insects, and then, with all that good stuff up there to eat,vertebrates. The fish best equipped for the journey to landwere species with muscular fins that had come in handy forcrawing around the bottoms of swamps.Eventually, those fins became limbs.1LLION YEARS AGO2 NLJON YEARS AO1 BILION YEARSフ。250 MILLION 230 MILLION 200 MILLONYEARS AGO65 MILLIONYEARS AGO28 MILLIONYEARS A60YEARS A60YEARS AGOYEARS AGOGiant continentbegins tobreak apart.Age of dinosaurs abruptly ends.Many scientists believe they diedin a mass extinction precipitatedby an asteroid impact andsubsequent cimate change.What they don't know is why dinosaursdied and not early alligators, turtles, andmammals survived. Some descendants ofdinosaurs still survive: birds.Human lineagedivergesfrom thatof our closetliving relatives,chimpanzees.Continents uniteto form Pangea.A mass extinctionApes appear.Age of dinosaursbegins.takes placewiping out 95%of all speciesthat had inhabltedthe Earth. eral Directions: Write your answers on your ANSWER SHEET provided at the end of this module.Analyze the pictures that follow. Write your analysis with focus on the relationship between theimages shown.LIFE O EARTH - A TIMELNE4 S A1.2 Complete the table.Pleces of evidence on the evolution of lifeTimeline1.3 What are the pieces of evidence on the evolution of life which may have enabled the first forms toevolve? Explain

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Perhaps the most persuasive fossil evidence for evolution is the consistency of the sequence of…

1.3 What are the pieces of evidence on the evolution of life which may have enabled the first forms to evolve? Explain