BIS2C_Lect25_Ward_Metazoa_Introduction_ppt

BIS2C_Lect25_Ward_Metazoa_Introduction_ppt - 1 BIS2C Winter...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 BIS2C Winter 2012 (Ward) Lecture 25. Introduction to Metazoa (animals) Todays lecture (27 February) recap: eukaryote tree metazoan features major lineages of animals major lineages of animals animal body plans & development 29 February: sponges (Porifera) 2 March: Cnidaria & Ctenophora 5 March: Bilateria Land plants Major eukaryote lineages Land plants Major eukaryote lineages Fungi Land plants Major eukaryote lineages Metazoa Fungi Choanoflagellates small group of aquatic heterotrophic eukaryotes ca. 140 species, some unicellular, others colonial cell similar in structure to sponge choanocytes 2 Choanoflagellates cell ovoid, with a collar of microvilli (tentacles) surrounding the single flagellum movement of flagellum (1) locomotion and (2) feeding (bacteria trapped on collar) Choanoflagellates cell ovoid, with a collar of microvilli (tentacles) surrounding the single flagellum movement of flagellum (1) locomotion and (2) feeding (bacteria trapped on collar) Choanoflagellates cell ovoid, with a collar of microvilli (tentacles) surrounding the single flagellum movement of flagellum (1) locomotion and (2) feeding (bacteria trapped on collar) Evidence that choanoflagellates are the sister group of Metazoa 1. Collar cells (shared between choanoflagellates and sponges) Evidence that choanoflagellates are the sister group of Metazoa 1. Collar cells (shared between choanoflagellates and sponges) 2. Structure of mitochondria Evidence that choanoflagellates are the sister group of Metazoa 1. Collar cells (shared between choanoflagellates and sponges) 2. Structure of mitochondria 3. DNA sequence data 3 Phylogeny of the opisthokonts based on concatenation of 110 nucleus-encoded proteins Ruiz-Trillo, I. et al. Mol Biol Evol 2008 25:664-672; doi:10.1093/molbev/msn006. Black dot: PP 1.0; red dot: PP 1.0, ML BS 100% Phylogeny of the opisthokonts based on concatenation of 110 nucleus-encoded proteins Ruiz-Trillo, I. et al. Mol Biol Evol 2008 25:664-672; doi:10.1093/molbev/msn006. Black dot: PP 1.0; red dot: PP 1.0, ML BS 100% Evidence that choanoflagellates are the sister group of Metazoa 1. Collar cells (shared between choanoflagellates and sponges) 2. Structure of mitochondria 3. DNA sequence data 4. Choanoflagellates have homologues of metazoan cell signaling and adhesion genes Evidence that choanoflagellates are the sister group of Metazoa 1. Collar cells (shared between choanoflagellates and sponges)1....
View Full Document

This document was uploaded on 03/18/2012.

Page1 / 8

BIS2C_Lect25_Ward_Metazoa_Introduction_ppt - 1 BIS2C Winter...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online