This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Kingdom Fungi Chapter 26, Fungi • Membrane-enclosed nuclei, mitochondria and other membranous organelles • Eukaryotic heterotrophs • Digestion is outside of the body • Infiltrate food source, secrete digestive enzymes onto food, then absorb predigested food • Cell walls with chitin (complex CHO) • Resistant to breakdown by most microorganisms • Fungi Structures Fungi include: • unicellular yeasts (simplest) • filamentous, multi-cellular molds (complex) • have long, threadlike filaments (hyphae) - elongate and infiltrate food source • branch to form a tangled mass (mycelium); grows into host • Some alternate between yeast form and hyphae • Fungus Body Plan • Reproduction (asexual) • Budding is also a form of asexual reproduction – quick and with little re-assortment e.g. yeasts • Reproduction (sexual) • Involves meiosis and generates new genotypes • Hyphae of two genetically haploid (n) compatible mating types unite (facilitated by pheromones) • Zygote (2n); meiosis results in haploid spores that can now form new hyphae • Review: A Generic Fungal Life Cycle • Fungi belong to the Opisthokonts; a monophyletic group that includes members of three kingdoms: • fungi (Kingdom Fungi) • animals (Kingdom Animalia) • and the choanoflagellates (from the Kingdom Protista) • As opisthokonts, fungi are more closely related to animals than to plants: •...
View Full Document
This note was uploaded on 02/11/2010 for the course BIO 01-119-10 taught by Professor D'arville during the Spring '09 term at Rutgers.
- Spring '09