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Author Question: What happened at the start of the Cambrian Period? A) the first oxygen-producing bacteria ... (Read 19 times)

schs14

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on: Jul 27, 2018
What happened at the start of the Cambrian Period?
 
  A) the first oxygen-producing bacteria appeared
  B) the first dinosaurs appeared
  C) early humans first appeared
  D) an explosion of genetic diversity appeared, leading to the appearance of the first animals

Question 2

The weight of an object on the Moon is what fraction of the weight of the same object on Earth?
 
  What will be an ideal response?


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princessflame2016

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Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

1/6


schs14

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Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

diana chang

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Reply 3 on: Yesterday
Wow, this really help

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