ZOO 2090 Study Guide - Midterm Guide: Chondrocranium, Invagination, Hyoid Bone

• School: University of Guelph
• Department: Zoology
• Course: ZOO 2090
• Professor: Jinzhong Fu

Document Summary

Homologous characters share a common ancestry/derived from. Zoo*2090 midterm review same ancestral structure: human hands and bird wings homologous as forelimbs. Analogous characters have same function but not necessarily same ancestry: insect wing and bird wing taxa genera, families. Phylogeny is a genealogy (historical relationships) of species or higher. A group that includes the most recent common ancestor and all its descendants is a monophyletic group. Together the three phyla make up deuterostoma, with protostoma as its sister group: deuterostoma = secondary mouths . Blastopore (first opening) of the embryo becomes anus and a new opening is formed for the mouth: protostoma = primary mouths . Phylum: chordata notochord extends to tail: subphylum: urochochordata , subphylum: cephalochordata , subphylum: vertebrata notochord replaced by vertebrae notochord extends to head. Subphylum: vertebrata: kingdom: animalia, phylum: chordata, class: mammalia, order: primates, family: hominidae, genus: homo, species: sapiens. Subfamily: homininae development: phylum echinodermata, phylum hemichordata.