Which term refers to the process by which volcanoes release carbon dioxide? a. sinking b. eruptions c. outgassing d. condensation

Which group is noted for the independence of gametophyte and sporophyte generations from each other? a) ferns b) mosses, hornworts, and liverworts c) charophytes d) angiosperms e) gymnosperms

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

Several billion years ago which gas was the least prevailant in the atmosphere