CAS CH 203 Lecture Notes - Lecture 1: Ultracentrifuge, Organelle, Photobleaching
21 Sep 2017
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25 questions in each quiz at the end of the chapters (make up 15% of exams) 3 midterm exams (1 hour each, 60 questions; mc and some passage-based) Final cumulative exam : december 21 (2 hours, about 100 questions) First multicellular organisms -- ~1. 7 billion years ago. Radiation of most large organisms -- ~0. 5 billions years ago: there was no oxygen when the first prokaryotes developed but there was gaseous hydrogen (h2), methane (ch4), ammonium (nh4), and water. Played(cid:9)a(cid:9)major(cid:9)role(cid:9)in(cid:9)our(cid:9)current(cid:9)understanding(cid:9)of(cid:9) molecular(cid:9)mechanisms(cid:9)underlying(cid:9)animal(cid:9)development: the fruit fly drosophila melanogaster has also been a crucial model organism in developmental biology, a short reproductive cycle (2 weeks) makes it very useful for genetic experiments. Large(cid:9)eggs: the frog xenopus laevis is an important model for studies of early vertebrate development, xenopus produces large eggs in large numbers, facilitating laboratory study and biochemical analysis, zebrafish are small and reproduce rapidly.
