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Biology

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Elyse Schaden

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Cards in this guide (5)
What causes differentiations of cells in complex organisms like humans

Switching genes on and off.

What kinds of molecules have been found on extraterrestrial meteors

Amino Acids

Approximately how long do scientists think chemical evolution took

about a billion years.

What slime covered structures are thought by some scientists to be where the first cells might have formed

Snotites

Which of these can be found in all cells

Protein building structures called ribosomes can be found in all cells.

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