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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

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

asked
User Msiyer
by
8.1k points

2 Answers

5 votes

Answer:

life forms

Step-by-step explanation:

answered
User Jordan Trana
by
8.5k points
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. 
answered
User KCL
by
8.7k points
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