How Life Began

This theory of the origin of life states that living things come from nonliving matter.

• spontaneous generation

• bubble hypothesis

• Primordial Soup theory

• Meteorite theory

Louis Pasteur used a goose-neck flask and demonstrated what?

• life spontaneously appears

• life begins from other organisms

• DNA is the building block

• Amino acids can be created artificially

Fossil evidence suggests life on Earth arrived

• 1.5 bya

• 4.6 bya

• 3.8-3.5 bya

• 4-5 bya

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Earth's early atmosphere had no

• gasses

• volcanoes

• water vapor

• free oxygen

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lightening and solar radiation provided enough energy to transform atmospheric chemicals into biomolecules, which then accumulated in the massive ocean covering the earth’s surface.

• primordial soup theory

• meteorite theory

• bubble theory

• spontaneous generation

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Bacteria and amino acids were brought to earh

• Primordial soup theory

• mass extinction

• meteorite hypothesis

• alien theory

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These scientists proved that organic molecules formed from inorganic molecules present in the Earth’s early atmosphere when given energy from lightening.

• lennon and mccartney

• watson and crick

• einstein and newton

• Miller and Urey

The Earth was ‘seeded’ with life by other sources in the universe

• universal truth theory

• panspermia

• alien seeding theory

• meteor shower hypothesis

A repeating cycle whereby organic molecules could have been brought together by energy from underwater volcanic gas bubbles and released into the atmosphere where UV rays changed them further

• evolution syntheis

• primordial soup theory

• creation theory

• Bubble hypothesis

The first prokaryotes did not require oxygen and were

• anaerobicc

• aerobic

• both aerobic an anaerobic

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