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Author Question: ____________ ____________ are catastrophic events in which a great many species die off ... (Read 81 times)

jerry coleman

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on: Aug 22, 2018

____________ ____________ are catastrophic events in which a great many species die off simultaneously (in
  geological terms). Fill in the blank(s) with the appropriate word(s).



Question 2

A(n) ____________ is a group of actually (or potentially) interbreeding organisms that is reproductively isolated from
  all other forms of living things. Fill in the blank(s) with the appropriate word(s).



AaaA

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Reply #1 on: Aug 22, 2018
Answer to Question 1

Mass extinctions

Answer to Question 2

species


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