asyadowney1 asyadowney1

17-11-2016
History

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What separates an eon into eras?
a) changes in rock layers
b) spieces extinctions (changes in types of organisms)
c) 300 million year chunks
d) types of plants and animals

Respuesta :

shinitora35 shinitora35

04-09-2019

Answer:

c

Explanation era's aren't defined by time but for a duration of time eons are what make it 300 million years

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