The structure seta of the sporophyte performs which of the following functions?
anchors the sporophyte to the supporting gametophyte
forms the supporting stalk
bears the spores

Which of the following statements is true? a. the main cause for speciation is an increase in gene flow. b. organisms that reproduce asexually are not considered part of a species. c. on a tree of life diagram, speciation is shown by the merging of two different lineages. d.the size of the geographic area inhabited by a population can cause speciation.

How does the study of genetic disorders such as pku biologists understand normal alleles?

Can someone i have no idea of how to do this.