Timmy has a disease that effects his cell cycle, it causes the Sphase to not work correctly, How would this be a problem if Timmy was injured?

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

Long term exposure to waves can cause sunburns and skin cancer.

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?