143k views
2 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 Please select the best answer from the choices provided A B C D

2 Answers

4 votes

Answer: Paleozoic era

Step-by-step explanation:

User JERKER
by
7.6k points
6 votes

Answer:

D

Step-by-step explanation:

Complex organisms with gills and lungs were major life forms that existed in the Paleozoic Era. The answer is D.

User HimanAB
by
9.0k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.