What must organisms be able to do to be considered the same species?

Which of the following claims does the author support the least

The body is protected against harmful flu viruses by

Which of the following is most important in making the typical seed more resistant to adverse conditions than the typical spore? a) a different type of sporopollenin b) an internal reservoir of liquid water c) integument(s) d) ability to be dispersed e) waxy cuticle