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Complex organisms with gills and lungs were major life forms that existed in the_____________. a. Mesozoic era c. Precambrian era b. Cenozoic era d. Paleozoic era
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Complex organisms with gills and lungs were major life forms that existed in the_____________.

a.
Mesozoic era
c.
Precambrian era
b.
Cenozoic era
d.
Paleozoic era

User ChiragBhalgami
by
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2 Answers

6 votes

Answer:

D. Paleozoic Era

Step-by-step explanation:

User DotNetInfo
by
5.4k points
3 votes

Answer:

D which is Paleozoic era

Step-by-step explanation:

Paleozoic era

User Yoonju
by
4.9k points
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