The amniote egg in which an embryo could develop completely on dry land arose during the:
A) Ordovician period
B) Permian period
C) Silurian period
D) Cambrian period
E) Devonian period
Correct Answer:
Verified
Q33: The Burgess Shale fossils are from the:
A)Ordovician
Q34: The first vertebrates to leave fossil evidence,jawless
Q35: The first amphibians appeared during the:
A)Cambrian period
B)Ordovician
Q36: The mass extinctions of the Permian period:
A)Paved
Q37: The Mesozoic era lasted from about:
A)65 million
Q39: The "Age of Dinosaurs" lasted about 120
Q40: The first flowering plants,first true mammals,and first
Q41: The three groups in the primate lineage
Q42: How is the ability of phospholipids to
Q43: How might multicellular organisms have arisen?
A)Single-celled organisms
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