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Lecture 014. Kingdoms Monera & Protista. Plantae Fungi Animalia Protista. eukaryotic. Monera (Eubacteria & Archaebacteria). prokaryotic. Kingdoms. Kingdom Monera. Species number low (~17, 000) Changing as we learn more Two phyla (divisions) Eubacteria (Bacteria & Cyanobacteria) - PowerPoint PPT Presentation
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Kingdoms
Plantae Fungi Animalia
Protista
Monera(Eubacteria & Archaebacteria)
prokaryoticprokaryotic
eukaryoticeukaryotic
Kingdom Monera
Species number low (~17, 000)
Changing as we learn more
Two phyla (divisions)
Eubacteria (Bacteria & Cyanobacteria)
Archaebacteria
Kingdom Monera
BacteriaCyanobacteria
Archaebacteria
Kingdom Protista
Molecular studies are giving us more informationMolecular studies are giving us more information
Evolutionary Pattern
BacteriaProkaryotic, single-celled organisms
No membrane-bound organelles
A very diverse group:Chemoautotrophic - Purple sulfur bacteria (extremophiles)
Photoautotrophic - Blue-green algae (cyano)
Heterotrophic - E. coli
Asexual reproduction by binary fission (rapid)
Identified by metabolic needs
4,000 ? species
Medical Quick Tests
Agar, nutrients & test chemical
color comparison chartcolor comparison chart
negativepositive
Root Nodules
NifTAL: Nitrogen Fixation of Tropical Agricultural LegumesNifTAL: Nitrogen Fixation of Tropical Agricultural Legumes
50% to 70% of the biological nitrogen fixation
Atmospheric N2
N “fixer”
Plant roots
Cyanobacteria
“Blue-green algae”
Only 200 species?
In different conditionsthey grow differently
Lots of colors
Photosynthetic7,500 ? species
Red Sea
Red-pigmented cyanobacteria floating on the surfaceRed-pigmented cyanobacteria floating on the surface
Red Sea
SaudiArabia
Egypt
Iran
Turkey
Nitrogen fixing cyanobacterium+ fern (Azolla)
Rapid growth
Used as a “green manure”
Productive Partnership: Azolla
Characteristics of Eukaryotic Cells• Membrane-bound nucleus
• Membrane-bound organelles
• Chromosomes consist of DNA and histone proteins and occur in pairs.
• Multiplication of eukaryotic cells involves mitosis.
• Reproduction is sexual and/or asexual
• Protists, fungi, plants & animals are composed of eukaryotic cells.
Kingdom Protista
Eukaryotic
Mostly single celled; however, if multicellular, then cells not well-organized into tissues and organs (more colonies of cells).
A very heterogeneous group include both heterotrophic and photoautotrophic forms
8 phyla
Lots of disagreements
Whittaker = “leftovers”
3 informal groups
Animal-like protists
Fungus-like protists
Plant-like (algal) protists
Misleading: some change
Kingdom Protista
~ 45,000 species
Ciliophora
Kingdom Animalia
Sarcomastigophora
Apicomplexa
Mastigophora
Euglenophyta
Kingdom Plantae
Chrysophyta
Pyrrophyta
Myxomycota
Kingdom Fungi
Kingdom Protista
Phylum Sarcomastigophora
“Amoeba”
Shell-like glass or calcium carbonate structures
Radiating projections
Animal-like Protists
13,000 species
Phylum Apicomplexa
“Sporozoa”
Parasitic, often 2 hosts
Resistant spore stage
Animal-like Protists
5,000 species
Malaria
Mosquito & “victim”
Africa = kills 1 million children per year
Thousands of sporozoites injected
Vaccine? (US support?)Fall ‘96: field trials failed
Travel to Malarial Infected Areas
Estimate your risk
Prevent mosquitobites
Take antimalarialdrug(s)
Know the symptoms of malaria
Seek help if you suspect infection
Phylum Ciliophora (“ciliates”)
Largest, most homogeneous
Share few characteristicswith others
Movement coordinated
Sex: 8 mating types
Animal-like Protists
8,000 species
Phylum Mastigophora(“zooflagellates”)
1 to thousands of flagellae
Some parasites
Vaccines? change protein coat!
Gave rise to animals?
Animal-like Protists
1,500 species
Fungus-like ProtistsPhylum Oomycota
(“water molds”; mildew, blights)
Some unicellular; others consist of hyphae
Decomposers,parasites
Cell walls- cellulose
Related to algae based on cell wall composition
Named after reproductive method
475 species
No “septa”
Oomycota Reproduction: the “egg fungi”, a relatively large egg cell is fertilized by a smaller “sperm nucleus,” forming a resistant zygote.
Fungus-like Protists
Phylum Myxomycota(“slime molds”)
Bizarre
Bright colors
Moving “slime” mass
Acellular body550 species
The Blob
Unidentified Growing Object
“Big as a platter, foamy and creamy and pale yellow.”
Died of sunstroke and nicotine poisoning
Plant-like Protists
• Dinoflagellates• Diatoms• Euglena• Cocolithophore• Green algae• Brown Algae• Red algae
Diatoms
Dinoflagellates
Radiolarian
Cocolithophore
Plant-like Protists
Phylum Pyrrophyta (“dinoflagellates”)
1,100 species
Cause “red tide”
Some live in corals
Marine and Freshwater
The numbers are representative values of the concentration in the tissues of dinoflagellate toxin (ppm)
Primary producers
Primary consumers
Secondary consumers
Tertiary consumers
0.04 ppm
0.23 ppm
2.07 ppm
13.8 ppm
Halimeda opuntia
Chlorophyta: Green Algae
Caulerpa racemosa
Caulerpa sertularioides
Dictyosphaeria cavernosa
Codium edule
Sargassum polyphyllumSargassum echinocarpum
Phaeophyta: Brown Algae
Turbinaria ornata
Padina japonicaHydroclathrus clathratus
Hypnea chordacea
Asparagopsis taxiformis
Galaxaura fastigiata
Acanthophora spicifera
Ahnfeltia concinna
Rhodophyta: Red Algae