The Origin of Life and Evolution

Where the better adapted organisms survive to pass traits along to offspring.

• Evolution

• Natural Selection

• Extinction

• Artifical Selection

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Change over time

• Natural Selection

• Selective Breeding

• Homeostasis

• Evolution

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Structures with the same parts have different functions; suggests that organisms share a common ancestry

• vestigial structures

• homologous structures

• adaptive radiation

• fossil

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Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.

• Because they come from dominant alleles.

• Because they come from recessive alleles.

• Because the trait is an acquired phenotype.

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What is a vestigial structure?

• Same structure, different function

• Different structure, same function

• A structure with no function

What were the first organisms on Earth?

• plants

• fungi

• fish

• bacteria

The apparatus in the Miller-Urey experiment was used to mimic what?

• proteins

• Earth's present conditions

• early Earth's conditions

• they didn't mean to mimic anything in particular

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What did the results of the the Miller and Urey experiment suggest? Life could have began:

• in a pond from combinations of chemicals in the atmosphere and energy in amino acids

• from RNA and then DNA

• from organic compounds (amino acids) that could be made by heating and passing a electrical current, to stimulate lightning, through a mixture of gases.

• when eukaryotes evolved from prokaryotes

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The primordial soup hypothesis by Oparin suggests life began:

• in a pond from combinations of chemicals in the atmosphere and energy in amino acids

• from RNA and DNA

• when eukaryotes evolved from prokaryotes

• from organic compounds (amino acids) that could be made by heating and passing a electrical current, to stimulate lightning, through a mixture of gases.

What is the RNA world hypothesis and how does it explain the origin of life?

• The RNA world hypothesis proposes that life on Earth originated from extraterrestrial RNA molecules.

• The RNA world hypothesis suggests that early life on Earth was based on proteins instead of RNA.

• The RNA world hypothesis states that RNA molecules were created after the origin of life on Earth.

• The RNA world hypothesis suggests that early life on Earth may have been based on RNA molecules instead of DNA.