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Published byΛαμία Ῥαχήλ Ζάνος Modified over 6 years ago
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Kingdom Protista Old, but not as old as bacteria billon years ago.
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Protista = the very first
Not plants, animals and fungi (but similar features) do not have true tissue. Not plants or animals or fungus.
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Features Most unicellular Most microscopic Eukaryotic
Autotrophic or heterotrophic Most live in aquatic habitats
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Classification of Protists
• Based on: – How they obtain nutrition – How they move • 1.) Animal-like – “protozoa” (1st animal) • 2.) Plant-like – “algae” • 3.) Fungus-like –“slime moulds”
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Protozoans (animal-like)
Usually motile Most: reproduce asexually Heterotrophic – – Holozoic – engulf their food – Saprozoic – absorb nutrients through their cell membranes Examples: ameba, paramecium Classified by how they move
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Protozoans Classified by how they move a.) Sarcodina – Pseudo feet
b.) Mastigophora (zooflagellates) – Flagella c.) Ciliophora (ciliates) – Cilia d.) Sporzoa – Don’t move (on their own)
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Sarcodines Ex.) Amoeba
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Zooflagellates Most – Parasitic
Parasite - an organism that lives in or on another organism (its host) and benefits by getting nutrients at the host's expense.
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Ciliates Most complex protozoans Ex.) Paramecium
Usually asexual reproduction
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Sporozoans Parasitic Complex life cycle
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Parasites Move to new hosts via a vector
Vector - an organism that can carry a parasite Can you think of examples?
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Malaria Protist: Plasmodium Vector: Anopholes Mosquito
million cases each year 2-3 million deaths per year Fever, headache, vomiting Lives in the bloodstream, clogs capillaries,destroys blood cells
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African Sleeping Sickness (Trypanosomiasis)
Protist: Trypanosoma • Vector: Tse Tse Fly • Sub-Saharan Africa • Fever, headaches, pain in joints • Infects the central nervous system, causes confusion, lack of coordination, uncontrolled sleepiness
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Giardiasis Protist: Giardia Transmission: Drinking contaminated water
Severe diarrhea, vomiting Protist lives in the digestive tract
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P.g. 331 Try this activity. G.) Classify the type of protists you think you saw?
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Plant-like Protists Have Chlorophyll - Photosynthesis Algae
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Euglenophytes Euglena – Live in water – Flagella for movement
– Photosynthesis in the light, but can consume solid food when light is unavailable – Have an eyespot for sensing light
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Euglenophytes
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Ecology Make up the base of aquatic food chains
Phytoplankton make up ~1/2-2/3 of the photosynthesis on Earth Can cause Red Tides (algal blooms) Toxic
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Algae blooms Excess growth of algae due to nutrient pollution
Use up all of the oxygen, organisms die the production of neurotoxins which cause mass mortalities in fish, seabirds, sea turtles, and marine mammals human illness or death via consumption of seafood contaminated by toxic algae[10] mechanical damage to other organisms, such as disruption of epithelial gill tissues in fish, resulting in asphyxiation oxygen depletion of the water column (hypoxia or anoxia) from cellular respiration and bacterial degradation
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Fungus-like Protists Heterotrophs Decomposers (saprophyte)
Slime moulds Leaves a slimy trail as it moves (slowly) across the ground Single cells come together to work as a primitive multicellular organism - Decomposer - Break down dead or decaying organisms
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Read P.g. 349 – 356 Answer questions 1-11 omit 5 Read the article on the worksheet, complete the worksheet and add your answers to question 12 (p.g.357)
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Homework Study page 346. (you can/should also do some research) Homework question. Answer in a paragraph form. Why were Fungi once classified in the plant kingdom but are now separate? Hint: Explain three similarities and three difference between plants and fungi. Be sure to EXPLAIN (don’t use words you don’t know or explain the meaning of the word for the reader.)
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Fungi definitions Mycelium – The branching filaments of a fungus that obtain the nutrients. Chitin – nitrogenous polysaccharide of long fibrous molecules (cell wall) Hypha – one branch of Mycelium Saprophtyes - decomposers
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Structure of a Mushroom
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Fungi Classification Mastigomycota – Flagellated spores, cellulose walls Amastigomycota – Nonmotile spores, Chitin walls Deuteromycota – Asexual reproduction (spores not seen), Chitin walls in some, parasitic.
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Fungi reproduction Asexual Fragmentation – breaking apart of mycelium
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http://wps. pearsoncustom
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Sexual Spores produces by sporangia dispersed by air currents
Germinate – to grow or sprout Dikaryotic – one cells contain two nuclei that have come from two different parents. Above ground cells also have two nuclei Cap – produces spores Gills – underside of the cap
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The two nuclei fuse, then split into 4, then each one released in one spore.
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Read the first three paragraph of 10.3 (p.g.) 369-370.
Write down the uses of the following Yeast Penicillium Aspergillus Mushrooms, Morels and Truffles Why else are fungi important? Define symbiotic relationship. What are linchen? How can we use them?
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lichen Green Algae or cynobacteria and fungus growing together.
Absorb water from the air Can help monitor air quality (pollution)
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Kingdom Plantae
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Plantae definitions Nonvascular – Without certain tissues (xylem and phloem) No tubes Vascular – Plants with conductive tissue that transport water and nutrients. Have tubes.
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Pteridophytes – No seeds (ex. Ferns)
Spermatophytes – seeds
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Gymnosperms – produce uncovered “naked” seeds ex.) pine tree
Angiosperms – produced seeds enclosed in fruit form by certain flower parts.
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Read p.g. 374 Answer questions 1-6 on p.g. 375.
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