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The boundaries of eras are marked by great worldwide changes in? A) earth’s crust B) life forms C) climate D) continental coastline
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The boundaries of eras are marked by great worldwide changes in?

A) earth’s crust
B) life forms
C) climate
D) continental coastline

User Msiyer
by
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2 Answers

5 votes

Answer:

life forms

Step-by-step explanation:

User Jordan Trana
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4 votes
Out of the choices given, the boundary of eras marked by a great worldwide changes in life forms. The correct answer is B. 
User KCL
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