01/08/13

(We finished up the cladogram of the vertebrates. I'm not sure (depending on which hour you're in) if you have this cladogram finished. 4th hour did not. So check with a neighbor. Below is the part of the cladogram on hearts, which Lit said would be on the test. Pictures came with it.)

Fish                                   Amphibians              Reptiles                        Birds                        Mammals
2-Chambered (50%)       2 then 3 (70%)     3, Ventrical paritally            4   (100%)                4 (100%)
                                                                         divided  (85%)    

~~~

II. Comparative Biochemistry--Comparing the sequences of DNA & Proteins. Allows us to determine genetic relationships between organisms.

III. Comparative Anatomy 

   A. Homologous Structures--Similar anatomically, but not necessarily similar functionally. Allows us to see

          Divergent Evolution--the structures become dissimilar functionally. 

   B. Analogous Structures--similar functionally but not similar anatomically. Evidence of Convergent

             Evolution--two "unrelated" species develop functionally similar structures from different origins.