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Week 4 Lecture Notes

by: Mackenzie Thompson

Week 4 Lecture Notes BIOL 112 101

Marketplace > Texas A&M University > Science > BIOL 112 101 > Week 4 Lecture Notes
Mackenzie Thompson
Texas A&M
Biology 112
William Wardle

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About this Document

These are the week 4 lecture notes
Biology 112
William Wardle
Class Notes
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This 4 page Class Notes was uploaded by Mackenzie Thompson on Wednesday October 14, 2015. The Class Notes belongs to BIOL 112 101 at Texas A&M University taught by William Wardle in Fall 2015. Since its upload, it has received 27 views. For similar materials see Biology 112 in Science at Texas A&M University.


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Date Created: 10/14/15
Kingdom Fungi 92215 Heterotrophic Cell wall made of chitin True fungi have 3 types of vegetative nonreproductive tissue 0 Distributive Finds organic matter and grows over it o Rhizoidal Absorbs food and organic matter 0 Sporangial Reproduction HyphaHyphae l lament o Aseptate not divided Primitive fungi Coenocytic enclosed by 1 cell wall 0 Septate divided Advanced fungi Mycelium 0 Mushroom l sporangium Haplontic l sexual o If 2 types come together they will fuse together their nuclei will merge and they form a 2n zygote which then goes through meiosis Some are substrateoriented o Freeliving saprotrophs o Symbiotic Commensals Mutualists Parasites Ph Chytridiomycota l Chytrids Aquatic or inaquatic hosts All parasitic hosts can be plants or animals Aseptate hyphae Primitive No distributive or sporangia hyphae Parasitized diatoms are ecologically important Parasitized tadpoles o Larva l metamorphosis l juvenile adult 0 Many are infected by chytrids and never reach metamorphosis Parasitized mosquito larvae o Chytrids prevent mosquitos from maturing Ph Zygomycota l Zygomycetes All saprobes Aseptate hyphae 0 Marine and freshwater habitats 0 EXAMPLE 0 Bread mold l Rhizopus Ph Ascomycota l Sac or Cup fungi Saprobes or symbionts Septate hyphae 3 possible sexual sporangia Asexual sporangia 0 EXAMPLE 0 Pencillium Used in cheese avoring P Camemberti o P Roqueforti Antibiotics More advanced species have cup sporangium 92415 Ph Basidiomycota I Club fungi Mushrooms and toadstools Sporangium is basidium 0 Sexual reproduction Stalk and cap are made up of dikaryotic hyphae Symbiotic o Aquatic and terrestrial Ph Deuteromycota l quotFungi lmperfectiquot Never show sexual sporangia EXAMPLE 0 Athlete s Foot 0 Jock Itch o Ringworm Septate or aseptate hyphae Mold Mould 0 Fuzzy grayishgreen powdery texture Yeasts Degenerate fungi o No mycelium No hyphae Unicellular o Binary ssion l Budding Asexual reproduction Produce faster than most fungi Most common is saccharomyces sugar Uchens Symbiotic relationship between a fungus and an algae o Unicellular algae only 0 Fungus partner mycobiont l host 0 Algae partner phycobiont l symbiont Mutualistic symbiosis Found on bare rock tree bark etc Chapter 29 Plant Diversitv Kingdom Plantae o Eukaryotic o Diplohaplontic l heteromorphic SgtG PhototrophicPhotosynthetic 0 Cell wall Truly multicellular 3 vegetative tissue types o Ancestor Ph Charophyta o Chlorophyll dominant chloroplasts 0 Cell walls of cellulose 0 Cell plate reproduction o Sperm cell is helical and has a pair of agellae 0 Parental care of zygote 0 Roots perform similarly to holdfasts in that they anchor however roots absorb water and minerals 0 Stem is stronger in air than stipe is in water 0 Leaves absorb gases blades do not 0 Algae 90 above 10 below Plants 67 above 33 below 0 3 organs of plants Roots Stem Leaves 0 Leaf produces photosynthesis and is agent of reproduction 0 Plant cells have large water vacuole Ph Bryophyta l mosses liverworts and hornworts Nonvascular l UNUSUAL Mosses are low growing due to being nonvascular Herbaceous no wood tissue ignin Helical charophytelike sperm 0 Require aquatic reproduction Spores are non agellated Ph Pterophyta l Ferns 0 First vascular plants 0 2 types of tissues 0 Xylem Tubular Take water and minerals dissolved in water in an upward direction from roots to stem and leaves 0 Phloem Collects products of photosynthesis Sugars and starches Called photosynthate From leaves in a downward direction to roots l feeds leaves along the way to feed roots


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