Question

Earth's Atmosphere: Effects of vascular plants on O2 and CO2 16 of 8 What atmospheric events coincided with the first 150 million years of vascular plant divergence? 0157:41 Multiple Choice eBook O O A ten fold rise in both O2 and CO2 levels eferences Aten fold drop in CO2 levels, followed by the highest peak ever in 02 O CO2 levels that rose to twice the level of O2 by the end of that period O

Answer 1

I think the answer will be (b), because low co2 level is the reason behind the vascular plant divergence over first 150 million years.

Thatswhy the answer will be (b), that is a ten fold drop in co2 level ,followed by highest peak ever in o2.