Placental mammals appeared during the _____ period.
A) Permian
B) Jurassic
C) Triassic
D) Cretaceous
E) Tertiary
Correct Answer:
Verified
Q30: The Cenozoic era consists of the _
Q31: The Mesozoic era lasted from about
A) 500
Q32: The amniote egg in which an embryo
Q33: Archosaurs and small therapsid reptiles survived the
Q34: The period in which modern continents were
Q36: The Precambrian supereon,in which life first appeared,and
Q37: The first vascular plants evolved during the
Q38: The plate tectonics that acted on separating
Q39: The "Age of Dinosaurs" lasted about 120
Q40: The "Age of Amphibians" was the _
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