BIO 1130 Lecture Notes - Lecture 21: Chordate, Shark Fin Soup, Cell Plate

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

We started to look at some of the first appearance of the vertebrates. Slams through the water with a brand new way of moving undulating tail, swam with its mouth open, trapping food that flowed through mucous. There were no lamprey back in the silurian and the. Cambrian but there were open mouthed fish back then. We can ad a set of fins what we end up with : A pair of fins down each side of the fish that create an anchor stabalization of the anterior body. The paired fins are moveable and articulated which will turn into legs. The dorsal fin is just a sta(cid:271)ile the (cid:271)ody as the tail (cid:449)ags i(cid:374) the (cid:271)a(cid:272)k the head does(cid:374)"t e(cid:374)d up thrashing back and forth. The jaw is another innovation: what we know about the embryology about how the jaw forms: those slits that are do(cid:449)(cid:374) the side areheld ope(cid:374) (cid:271)y (cid:272)artilage or (cid:271)o(cid:374)e so that they dot (cid:272)ollapse.