Is a theory stating that the continents had once been joined but then drifted apart.

a. plate tectonics

b. continental drift

c. continental tectonics

Which prevent errors in dna replication? a. helicase enzyme checks the dna for errors. b. each base can attach to only one other type of base. c. ribosome enzymes prevent errors from happening. d. dna contains no complementary base pairs.

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

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat