1.   Could it be used to predict the mating system of species that had not been studied?

2.   To determine our mating system we need to know our natural habitat and our past.

3.   He proved his thesis by comparing two groups of closely related insects that differed in their mating systems.

4.   In other mating systems, she explained, many and sometimes most males never get the chance to mate.

5.   Mating systems have evolved over millions of years, as males and females try to achieve their conflicting agendas.

6.   Penis fencing has been seen only in flat worms so far, but Michiels suspects that other hermaphroditic species have also evolved violent mating systems.

7.   This is completely unlike the mating system of many wild mammals where males fight for dominance and the winner gets the females.