Lec11_2011BILD3

Lec11_2011BILD3 - Lec 11: Organismal Diversity II I....

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Lec 11: Organismal Diversity II I. Overview II. Eukarya (fungi) III. Eukarya (invertebrates) IV. Eukarya (vertebrates)
Background image of page 1

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

View Full DocumentRight Arrow Icon
I. Overview
Background image of page 2
Evolutionary origins of animals and fungi Molecular systematics provides solid support for animals and fungi sharing a common ancestor with other opistokonts. Mulitcellularity appears to have independently evolved in lineages leading to animals and fungi.
Background image of page 3

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

View Full DocumentRight Arrow Icon
II. Eukarya (fungi) 100,000 described species; actual diversity likely much higher Unicellular (yeasts and filamentous forms) and multicellular Spores disperse far and wide. Absorptive, heterotrophs that break down organic matter (including cellulose and lignin) Many parasites (some pathogenic) and mutualists Oldest fossils from 460 mya; group likely much older
Background image of page 4
Multicellular fungi are primarily composed of hyphae (sum = mycelium) Fungal cell walls contain chitin , which is a nitrogen- rich poly- saccharide.
Background image of page 5

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

View Full DocumentRight Arrow Icon
Major fungal lineages Zygomycetes (about 1000 species) - molds that grow on breads and fruit - others parasitic or commensal symbionts of animals Glomeromycetes (160 species) - arbuscular mycorrhizal fungi
Background image of page 6
Major fungal lineages Ascomycetes (about 65,000 species) - marine, terrestrial and aquatic species - diverse habits: parasites partners in lichens free-living ectomycorrhizal endophytic
Background image of page 7

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

View Full DocumentRight Arrow Icon
Major fungal lineages Basidiomycetes (30,000 species) - shelf fungus, mushrooms, puff balls - some ectomycorrhizal; others important plant pests (rusts and smuts) - basidomycetes are important decomposers of wood; capable of breaking down lignin (a complex polymer)
Background image of page 8
Lichens are symbiotic associations between a photoautotroph (either green algae or cyanobacteria) and a fungus (usually
Background image of page 9

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

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/25/2012 for the course BILD 3 taught by Professor Wills during the Spring '07 term at UCSD.

Page1 / 33

Lec11_2011BILD3 - Lec 11: Organismal Diversity II I....

This preview shows document pages 1 - 10. Sign up to view the full document.

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