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Questions and Answers
Which characteristic is associated with fungi-like protists?
Which characteristic is associated with fungi-like protists?
- Autotrophic
- Chemotrophic
- Heterotrophic (correct)
- Phototrophic
Fungi-like protists are commonly referred to as:
Fungi-like protists are commonly referred to as:
- Mildews
- Algae blooms
- Slime molds (correct)
- Water molds
Where are fungi-like protists most likely to be found?
Where are fungi-like protists most likely to be found?
- Volcanoes
- Polar ice caps
- Deserts
- Rotting wood (correct)
To what domain do slime molds belong?
To what domain do slime molds belong?
How do slime molds reproduce?
How do slime molds reproduce?
What is the significance of mitosis in the life cycle of Acrasiomycota?
What is the significance of mitosis in the life cycle of Acrasiomycota?
Which of the following is a characteristic feature of Acrasiomycota, or cellular slime molds?
Which of the following is a characteristic feature of Acrasiomycota, or cellular slime molds?
In the phylum Myxomycota, what is the plasmodium?
In the phylum Myxomycota, what is the plasmodium?
Which process leads to genetic recombination in Myxomycota?
Which process leads to genetic recombination in Myxomycota?
What triggers the aggregation of individual amoeba-like cells in cellular slime molds (Phyla Acrasiomycota)?
What triggers the aggregation of individual amoeba-like cells in cellular slime molds (Phyla Acrasiomycota)?
How does the cellular organization of Myxomycota (acellular slime molds) differ from that of Acrasiomycota (cellular slime molds)?
How does the cellular organization of Myxomycota (acellular slime molds) differ from that of Acrasiomycota (cellular slime molds)?
In acellular slime molds, what is the immediate result of the fusion of flagellated cells?
In acellular slime molds, what is the immediate result of the fusion of flagellated cells?
A scientist is studying a newly discovered species of slime mold. Under a microscope, they observe a large, multinucleated mass of cytoplasm moving across a decaying log. To which phylum does this slime mold most likely belong?
A scientist is studying a newly discovered species of slime mold. Under a microscope, they observe a large, multinucleated mass of cytoplasm moving across a decaying log. To which phylum does this slime mold most likely belong?
What is the primary evolutionary advantage of the aggregating behavior observed in cellular slime molds when food is scarce?
What is the primary evolutionary advantage of the aggregating behavior observed in cellular slime molds when food is scarce?
Imagine a scenario where a scientist artificially induces the formation of fruiting bodies in both Acrasiomycota and Myxomycota while carefully controlling the availability of nutrients. If they then analyze the genetic diversity of the spores released, what key difference would they expect to find?
Imagine a scenario where a scientist artificially induces the formation of fruiting bodies in both Acrasiomycota and Myxomycota while carefully controlling the availability of nutrients. If they then analyze the genetic diversity of the spores released, what key difference would they expect to find?
Flashcards
Fungi-like Protists
Fungi-like Protists
Protists that resemble fungi and are difficult to classify. Also known as slime molds.
Heterotrophic
Heterotrophic
Nutrition by acquiring nutrients from organic substances.
Slime Mold
Slime Mold
A protist that exists as an amoeba-like cell in one stage, and produces mold-like masses that give rise to spores in another stage.
Phyla Acrasiomycota
Phyla Acrasiomycota
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Individual cells
Individual cells
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Large mass of cells
Large mass of cells
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Fruiting body
Fruiting body
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Phyla Myxomycota
Phyla Myxomycota
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Acellular Slime Mold
Acellular Slime Mold
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Plasmodium
Plasmodium
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Fruiting bodies (Myxomycota)
Fruiting bodies (Myxomycota)
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Haploid spores
Haploid spores
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Diploid amoeboid cells
Diploid amoeboid cells
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Study Notes
- Fungi-like protists are intended to describe the characteristics of fungi-like protists.
- Starter question aims to explore how fungi are different from plants and animals.
- Fungi-like protists are also known as slime molds.
- Classifying slime molds is difficult.
- Slime molds are heterotrophic.
- A slime mold is a protist, that is amoeba-like at one stage.
- During other stages, slime molds produce mold-like masses that give rise to spores.
- Slime molds are found near rich sources of food, such as rotting wood, piles of compost, and wet lawns.
- Slime molds can be divided into two phyla: Acrasiomycota and Myxomycota.
Phyla Acrasiomycota (Cellular Slime Molds)
- These slime molds begin their life cycle as individual cells resembling amoebas.
- Amoeba-like cells can reproduce rapidly.
- When the food supply becomes depleted, amoeboid cells gather to form a large, multicellular mass.
- The mass of cells forms a reproductive fruiting body which produces spores through mitosis.
- The spores produce amoeboid cells which repeat the cycle.
Phyla Myxomycota (Acellular Slime Molds)
- An acellular slime mold begins its life cycle as an amoeba-like cell.
- Acellular slime molds produce plasmodia.
- Plasmodium is a mass of cytoplasm containing many nuclei enclosed in a single cell membrane, several cm in diameter.
- The large plasmodium of an acellular slime mold is a single multinucleated cell.
- Fruiting bodies spring up from the plasmodium.
- The fruiting bodies produce haploid spores by meiosis that turn into cells with flagella.
- These flagellated cells fuse to produce diploid amoeboid cells that repeat the cycle.
Key Terms
- Slime molds: Fungi-like protists.
- Heterotrophic: Organisms that cannot produce its own food.
- Amoeba-like: Resembling or similar to amoebas in form or movement.
- Spores: A unit of sexual or asexual reproduction.
- Phyla Acrasiomycota: Cellular slime molds.
- Phyla Myxomycota: Acellular slime molds.
- Multicellular: Consisting of many cells.
- Mitosis: A type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
- Plasmodia: A mass of cytoplasm containing many nuclei enclosed in a single cell membrane.
- Multinucleated cell: A cell containing multiple nuclei.
- Fruiting bodies: A structure that produces spores.
- Meiosis: A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell.
- Haploid spores: Spores with a single set of chromosomes.
- Flagella: A whip-like appendage that enables cells to move.
- Diploid amoeboid cells: Amoeboid cells with two sets of chromosomes.
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