Alternatively, it may proceed as a result of self-fertilization ( autogamy ), or it may follow conjugation, a sexual phenomenon in which ciliates of compatible mating types exchange genetic material.
12.
"Cullenia exarillata " is an outcrossing species, producing negligible fruit-set under geitonogamy and no fruit-set under autogamy . as well as by Lion-tailed Macaques over short distances.
13.
Under certain conditions, it may be preceded by self-fertilization ( autogamy ), or it may follow conjugation, a sexual phenomenon in which " Paramecia " of compatible mating types fuse temporarily and exchange genetic material.
14.
In some species, such as the well studied " Paramecium tetraurelia ", the asexual line of clonally aging paramecia loses vitality and expires after about 200 fissions if the cells fail to undergo meiosis followed by either autogamy ( self-fertilizaion ) or conjugation ( outcrossing ) ( see aging in " Paramecium " ).
