BLG 181 Lecture 4: L4
Document Summary
Outcome of any phenomenon has to have a goal. Influenced by philosophers: plato (428-348bc) philosophy of idealism. Striving to become more ideal: aristotle (384-322bc) spe(cid:272)ies (cid:449)ere fi(cid:454)ed, de(cid:448)eloped (cid:862)s(cid:272)ale of (cid:374)ature, progressio(cid:374) to(cid:449)ards perfe(cid:272)tio(cid:374) First to provide a casual mechanism: the inheritance of acquired characters. Organisms changed over their lifetime and pass on characters they developed to their offspri(cid:374)g"s. Follo(cid:449)ed aristotle"s (cid:448)ie(cid:449: believed in spontaneous, organisms that appear or change. Problem: acquired characters without a dna cannot be passed on because of lack of genetic basis. Vogae on hms beagle (1831 1836) Initiated scientific study of evolution: rainforests of brazil, fossils, birds, and reptiles of the galapagos islands, example: terrestrial iguana. Some eat cactus whereas others eat food under water: example: tortoise. Dome shelled tortoise from santa cruz island, an island with abundant vegetation has a small neck and a heavy shell. Flat shelled tortoise from espa ola island, an island with spares vegetation has a long neck.
