What does primary productivity measure?

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

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

How will you manage your time to accomplish the necessary tasks both on the job and at home?