BIOL10210 Lecture Notes - Lecture 4: Prokaryote, Pubic Hair, Nuclear Dna
Document Summary
Bdelloid rotifers, rat(cid:272)het, hat(cid:272)het a(cid:374)d the red quee(cid:374) What is a proximate cause of behavior: event closes to and immediately responsible for causing a certain type of behavior. Sex=reproduction: reproduction is not sex; bacteria cells reproduce, turtles have sex with crocs, not the same. The problem with bdelloid rotifer: only reproduce asexually, clone themselves tends to be a recipe for extinction yet (cid:271)ee(cid:374) here for 80 (cid:373)illio(cid:374) (cid:455)ears. Ase(cid:454)ual reprodu(cid:272)tio(cid:374) is (cid:373)ore effi(cid:272)ie(cid:374)t, do(cid:374)"t (cid:374)eed t(cid:449)o differe(cid:374)t ge(cid:374)ders, do(cid:374)"t (cid:374)eed to fi(cid:374)d a part(cid:374)er, et(cid:272). Then why sex: muller"s ratchet, process of recombining with another organism, chance of mutations, (cid:449)hat (cid:373)akes e(cid:448)olutio(cid:374) ru(cid:374), (cid:455)et huge (cid:374)u(cid:373)(cid:271)er are (cid:374)ot useful, so(cid:373)e fatal. If (cid:455)ou do(cid:374)"t li(cid:448)e to reproduce, not fit. We evolve, parasites evolve, cycle, push for survival: more on the red queen effect, coevolution species that exist in the same environment, competition pushes for evolutions in both species. Advantage of sexual reproduction, greater variance through reproduction.
