Biology 3229F/G Lecture Notes - Lecture 1: Cambrian Explosion, Diving Plane, Osmoregulation

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Looking at genetics of organisms, we find that the genes that code for things like nerves, osmoregulation, etc. are the same in us as they are in all of these animals. Based the associations on overall similarities between animals. Bow plan of the organism = body plan of the organism, characteristic trait. Traits are unique characteristics that define the group organisms like the jellyfish. Darwin realized that with time animals can go in different directions = animal domestication. This is because animals are monophyletic (single origin) can trace ancestry back to. Animals we look at are all extant = means they aren"t extinct, have been living for a. Many species of animals placed into 34 groups = phyla. Cambrian period they could have existed before then, but we see them for the. Cnidarians have unique stinging trait coral, jellyfish. Carl took on the task of categorizing all species 250 years ago hierarchical manner.

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