Select the best answer for the question.
During the Carboniferous period, plants and animals grew very large due to high concentration of
A. oxygen in the atmosphere.
B. argon in the oceans.
C. carbon dioxide in the oceans.
D. nitrogen in the atmosphere.
Answer (1)
During the Carboniferous period, high levels of oxygen in the atmosphere contributed to the large size of plants and animals. The correct answer to the question is A: oxygen in the atmosphere. This led to significant evolutionary adaptations during this time. ;
