01:119:116 Lecture Notes - Lecture 5: Collagen, Meiosis, Homeobox

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:116
• Professor: Professor Beal

Document Summary

Sticky collar: heterotrophy, 1. 3 million living species identified, possibly 10-20 million species, derived traits of the animals, heterotrophs - digest internally. All are multicellular: cell structure and organization, no cell walls! Use collagen for support ; extracellular matrix: cell differentiation- cells w/ specific jobs, most animals = tissues; muscles & nerves; organs, reproduction and development. Sexual or asexual reproduction: diploid fo most life cycle, meiosis sperm + egg, animal development has a pattern: Fertilized egg = zygote (2n: cleavage, blastula, ball of cells . If there are tissues gastrulation: the gut, the gastrula has at least, endoderm, ectoderm, archenteron - forming gut, many have a larval stage. Ii: symmetry, animals can be categorized according to the symmetry of their bodies, or lack of it, porifera (sponges) = asymmetry, radial symmetry. Pizza: wheels, bilaterally symmetrical animals have, heads - cephalization =the development of a head.