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Home Q & A Board Biology-Related Homework Help General Biology
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Arroyo21 Arroyo21
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6 years ago
The greatest mass extinction of all time, which occurred at the end of the Permian period:a.
   affected plants living on land more than any other group.
  b. was spread out over several million years.
  c. resulted in the extinction of more than 90 of all existing marine species.
  d. only impacted a few geographic regions, although the impact in these regions was
  staggering.
  e. did not affect terrestrial species

Question 2

Dragonflies that ranged in size from those smaller than today's dragonflies to some with wingspans of
  75 centimeters (2.5 feet) appeared during the:a.
   Cambrian period.
  b. Ordovician period.
  c. Silurian period.
  d. Devonian period.
  e. Carboniferous period.
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tcshepherd13tcshepherd13
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6 years ago
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Arroyo21 Author
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#2
6 years ago
Thank you for taking the time to explain this, just got my quiz back: Perfect
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