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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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35 votes
35 votes
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 Little Santi
by
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2 Answers

21 votes
21 votes

Answer:

D. Paleozoic Era

Step-by-step explanation:

User Kabanus
by
3.2k points
12 votes
12 votes

Answer:

D which is Paleozoic era

Step-by-step explanation:

Paleozoic era

User Taufik Nurrohman
by
3.0k points
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