History of life on Earth

The idea that Earth's early oceans had organic molecules that became the first life is called.

• primordial soup
• bubble hypothesis
• Miller-Urey Experiment
• radioactive dating theory

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NGSS.HS-LS1-6

Cellular life may have begun with ____________ made of amino acids.

• macrospheres
• microspores
• microspheres
• macrospores

Microspheres had DNA so they were able to pass their characteristics along to their offspring.

• true
• false

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___________________ evolved after RNA

• amino acids
• atoms
• DNA
• molecules

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The first eukaryotic cells are more likely to have evolved from ______________ than eubactria (true bacteria).

• exocytosis
• endosymbiosis
• organelles
• Archaebacteria

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NGSS.HS-LS4-2

The group __________________ includes many of the bacteria that cause our diseases.

• Plantae
• Archaebacteria
• Eubacteria
• Animaliae

The oldest known fossils of multicellular organisms were found in rocks older than the 

• Cambrian period
• Precambrian period
• Hadeon Era

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NGSS.MS-LS4-1

Why do most scientists think the 6th mass extinction is occurring now?

• Human activity is destroying ecosystems
• animal competition is decreasing species diversity
• They don't

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NGSS.HS-LS2-7

When did life probably first appear on Earth?

• 4.8 billion years ago

• 3.8 billion years ago

• 4.8 million years ago

• 3.8 million years ago

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NGSS.HS-ESS1-6

NGSS.HS-ESS2-7

The first simple life was ....?

• Animal life

• Plant life

• Eukaryotic

• Prokaryotic

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NGSS.HS-LS4-2