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Answered

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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

Sagot :

bellapink134

Answer:

D which is Paleozoic era

Explanation:

Paleozoic era

Answer:

D. Paleozoic Era

Explanation:

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