BIO 106 Lecture Notes - Lecture 8: Poikilotherm, Ectotherm, Lightning
Document Summary
R is lots of eggs with low success rate k is longer life span with less egg. Sh- one ore more individual or a single species. Shes- more than one species, regardless of the number of species jawless shes- Superclass agnatha two classes myxini & cephalaspidomorphii do not have vertebrate primitive notochord feed by suction using round muscular mouth and rows of teeth eel-like body form no scales or paired ne. Class chondrichthyes two sub classes paired ns and nares skeletons made of cartilage have moveable jaws with well-developed teeth skin covered by tiny, non-overlapping rear-facing placed scales. 50 living species deep-water sh (200-2600) diverged from sharks 400 ma. ~500 species generally live near sea oor torso-ventrally attened bodies ventral gill slits. Attened, expanded pectoral ns feed on clams, crabs, demersal shes using teeth modi ed into grinding plates electric rays 9torpedo produce 220 volts for feeding, defense sting rays have a whip-like tail with defensive spine at base.
