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Home Q & A Board Biology-Related Homework Help General Biology
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lacieb23 lacieb23
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6 years ago
Vascular plants and air-breathing animals first appeared during which time period?
  a. Silurian period
  b. Permian period
  c. Cambrian period
  d. Ordovician period
  e. Cretaceous period
 
 

Question 2

During which time period did shallow seas cover much of the land and another burst of evolutionary diversification
  occur?
  a. Silurian period
  b. Permian period
  c. Devonian period
  d. Ordovician period
  e. Carboniferous period
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DuhitzlitzyDuhitzlitzy
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6 years ago
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lacieb23 Author
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#2
6 years ago
Love when things are free, so much better than CourseHero
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#3
6 years ago
tell your friends and feel free to ask more questions
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