BIO SCI 94 Study Guide - Midterm Guide: Symmetry In Biology, Filter Feeder, Detritivore

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 94
• Professor: Robin Bush

Document Summary

Chapter 33: introduction to animals cambrian explosion - diverse animals suddenly appeared in fossil record. 33. 1 - what is an animal? animals - eukaryotes with key traits: cell-cell adhesion & communication. Multicellular, lack cell walls, have extracellular matrix - includes proteins specialized for. (minus sponges) have [1] neurons (nerve cells) + [2] muscle cells. Only multicellular heterotrophs on tree of life that ingest food before digesting it. Multicellularity + heterotrophy + efficient movement = eating machines phyla - major lineages of animals. 33. 2 - what key innovations occurred during the evolution of animals? three types of data: Provide direct evidence of what animals appearance, when they existed, and. Which embryonic, larval, or adult moropho charac are common among groups of animals and find synapomorphies. Used to define fundamental architecture - body plan , of each animal lineage. Relative similarity of genes/whole genomes of diverse organisms.