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Author Question: What period of Earth's geologic history saw a dramatic increase in life? a. Cretaceous b. ... (Read 43 times)

crobinson2013

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on: Jul 27, 2018
What period of Earth's geologic history saw a dramatic increase in life?
 
  a. Cretaceous
  b. Devonian
 c. Jurassic
 d. Tertiary
 e. Cambrian

Question 2

Which describes the direct change in genetic information of a cell?
 
  a. chromosome
 b. mutation
 c. evolution
 d. natural selection
  e. heredity


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jaygar71

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

e

Answer to Question 2

b


crobinson2013

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Reply 2 on: Jul 27, 2018
Wow, this really help

yeungji

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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