List at least two pieces of data supporting the hypothesis that there is a link between the sickle cell allele and malaria.

Is snow a type of precipitation? explain why or why not.

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

What are genotypes? what are phenotypes?