Protists and Fungi By: Mr. Hunter. Protists What do all protozoa have in common? Eukaryotic Range...
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Transcript of Protists and Fungi By: Mr. Hunter. Protists What do all protozoa have in common? Eukaryotic Range...
![Page 1: Protists and Fungi By: Mr. Hunter. Protists What do all protozoa have in common? Eukaryotic Range from single to multi-cellular Highly diverse.](https://reader035.fdocuments.us/reader035/viewer/2022062409/5697bffa1a28abf838cc0654/html5/thumbnails/1.jpg)
Protists and Fungi
By: Mr. Hunter
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Protists
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What do all protozoa have in common?
Eukaryotic
Range from single to multi-cellular
Highly diverse
Do not have specialized tissues for functions
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What do all protists have in common?
Use many methods of getting food (some even use photosynthesis; some are heterotrophs; some are parasites)
Reproduce sexually (conjugation) and asexually (binary fission)
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Sexual Reproduction of Paramecium
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Classification of Protists
Heterotrophs that can move
Heterotrophs that cannot move
Producers
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Protist Producers- Algae
Algae make food through photosynthesis.
Examples: seaweed, phytoplankton
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Seaweed & Phytoplankton
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Type of Algae
Size Location How does the algae get its food?
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Describe
Diatoms
Dinoflagellates
Euglenoids
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Heterotrophs that can move
Amoeba
Zooflagellates
Ciliates
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Amoeba
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Amoebic Dysentery Amoebiasis is an infectious disease caused by a one-celled
parasite called Entamoeba histolytica, which causes both intestinal and extraintestinal infections.
Two species of Entamoeba are morphologically indistinguishable: Entamoeba histolytica is pathogenic and Entamoeba dispar harmlessly colonizes the colon. Amoebas adhere to and kill the cells of the colon and cause dysentery with blood and mucus in the stool.
Amoebas also secrete substances called proteases that degrade lining of the colon and permit invasion into the bowel wall and beyond. Amoebas can spread via the circulation to the liver and cause liver abscesses. The infection may spread further by direct extension from the liver or through the bloodstream to the lungs, brain, and other organs.
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Mild early symptoms
Weight loss Anaemia Indigestion Intermittent diarrhoea with foul-smellingstool that may
be preceded by constipation. Dehydration Blood and mucus in the stool. Gas and Abdominal Bloating Abdominal cramps and tenderness Fever Fatigue Chills
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Zooflagellates Giardia Lamblia
Termite Gut (Mutualism)
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Heterotrophs that CAN’T move
Spore-forming protists
Complicated life cycles that involve two or more hosts
Ex. Malaria
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Malaria 500 million people contract malaria
each year and 2.7 million people die from it each year.
Infection with malaria parasites may result in a wide variety of symptoms, ranging from absent or very mild symptoms to severe disease and even death.
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The classical (but rarely observed) malaria attack lasts 6-10 hours. It consists of:
a cold stage (sensation of cold, shivering)
a hot stage (fever, headaches, vomiting; seizures in young children)
and finally a sweating stage (sweats, return to normal temperature, tiredness)
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Symptoms
Fever Chills Sweats Headaches Nausea and vomiting Body aches General malaise.
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Water Molds
Water molds live in water, soil or other organisms
Decomposers and parasites
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Slime molds
Only move at certain times during their life cycles
Use pseudopodia to move and to eat bacteria and yeast
Spores- reproductive cells covered by a thick wall
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Slime Mold In An Aquarium
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Slime Mold
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Heterotroph Spore-forming protists Parasite Water molds Host Slime molds Red Algae Green Algae Brown Algae Phytoplankton Diatoms Dinoflagellates Euglenoids Amoebas Psuedopodia Zooflagellates Ciliates
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The World Without Fungi No leavened bread No penicillin No blue cheese No mushrooms Collections of dead organic matter No soy sauce No beer No athlete’s feet
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What are characteristics of fungi?
Eukaryotic Heterotrophs Rigid cell walls Diverse shapes, methods of obtaining
food Various modes of reproduction
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Hyphae
Long, nonreproductive filaments
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Mycelium
The mass of fungal filaments, or hyphae, that forms the body of a fungus
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Asexual Reproduction in Fungus
Hyphae break apart and each new piece becomes a fungus
Spore formation
Spores are small reproductive cells that are protected by a thick cell wall that
grow into a new fungus.
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Sexual Reproduction in Fungi
Special structures form to make sex cells that join to produce sexual spores that grow into a new fungus.
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Shape Sex. Or Asex.?
Description
Details
Drawing
Threadlike
Sac
Club
Imperfect
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Threadlike Fuzzy (mold)
Asexually: sporangia break open and release spores into the air
Sexually: hyphae join up
Details: parasites, live in the soil, decomposers
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Threadlike Fungi
The mold of the genus Pilobolus grows on animal manure.
This mold produces little sacs of spores on top of stalked structures that swell, and sacs are shot up 8 meters into the air!!!
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Threadlike fungi
Their spores adhere to grass and leaves.
Animals eat the leaves, the spores pass through their digestive tracts, and end up in dung where the spores germinate.
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Bread Box Nightmares
White bread Wheat bread
20 drops of water 20 drops of sugar water 20 drops of lemon juice
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Match up the words correctly and use each pair in an
accurate sentence.
Threadlike fungi Sac fungi Club fungi Ascus Gills Sporangia
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Intriguing Fungi Mushrooms consist mostly of water.
Shiitake mushrooms were thought to promote good health by the people of ancient China.
They were correct since these mushrooms are rich in Fe, P, Ca and protein.
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Shiitake Mushrooms
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World’s Largest Fungus?
A fungus that covered an area of 4 square kilometers and weighed nearly 1,000 tons that is 1,000 years old was found in Seattle, Washington!
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Saccharomyces cerevisiae
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Saccharomyces cerevisiae
Bread, beer, wine
Genetic manipulation
Molecular and cellular biology experiments
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Fungi
Fungi are the major cause of plant diseases.
At least 5,000 kinds of fungi attack crops, garden plants, and wild plants.
Ringworm
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Ringworm
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Lichens
Lichen: a combination of a fungus and an alga that grow together in a mutualistic relationship
How is this relationship mutualistic?
How are lichens important?