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Evidence that life on earth is extremely old

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Reference no: EM13793576

Question 1

The evidence that life on Earth is extremely old comes from

fossil algae in rocks more than 3 billion years old
fossils buried thousands of feet below the surface
fossil algae in rocks a few million years old
the discovery of silicon based life forms in ancient rocks
the discovery of silicon based life forms in a Miller - Urey experiment

Question 2

When Urey and Miller completed their experiment they found ___ in their mixture.

DNA
RNA
amino acids
ATP

Question 3

These unicellular organisms do not contain a nucleus.

DNA
eukaryotes
prokaryotes
protenoic

Question 4

________ proposed the existence of canali on Mars.

Einstein

Galileo

Copernicus

Schiaparelli

Question 5

The __________ is a range of wavelengths between 18cm and 21cm.

atmospheric window

SETI
waterhole
panspermia

Question 6

If we sent a signal to an exoplanet suspected to have intelligent life, if the exoplanet is 200 light-years away, how long would it take to receive a message from the exoplanet assuming intelligent beings received the signal and sent one back right away?

200 years

100 years

300 years

400 years

600 years

Reference no: EM13793576

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