Vertebrate Zoology Notes Part the First Phylum Chordata Four Traits: 1. Notochord 2. Ventral, tubular nerve cord 3. Post anal tail. 4. Pharyngeal gill slits. Subphylums Hemichordata- Really a phylum. Have an analogous notochord structure. Urochordata
Vertebrate Zoology Notes Part 2
The Span of Time So Far (in regards to vertebrates) Have their start with the first tetrapods during the mid-Devonian. During this time the continents were drifting towards each other but had not formed Pangaea. Plant
3rd Part Vertebrate Biology Notes
Control of Body Temp This is an important capability as the rate of biological processes affected by temperature. The terms Poikliothermic and homeothermic refer to how an organisms body temperature varies over time.