Identify the subsystem of Earth that takes the longest amount of time to change, based on the geologic time scale.

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

The negative impacts of nonnative species generally outweigh the positive impacts

Explain why scientists use the word dominant for certain traits.