1. Explain How does conjugation produce genetic diversity in a population of Paramecium 2. Compare...
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1. Explain How does conjugation produce genetic diversity in a population of Paramecium
2. Compare and Contrast How does a macronucleus differ in function from a micronucleus
3. Compare and Contrast Compare asexual and sexual processes in paramecium- include the terms mitosis and meiosis
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CH 21 PROTISTS AND FUNGI21.2 Protist Structure and Function
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How Protists Move
Change their cell shape Specialized organelles Do not actively move.
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Amoeboid Movement
Move by changing their shape Pseudopods
Use of cytoplasmic projections Powered by a cytoskeletal protein- actin.
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Cilia and Flagella Cilia
Short and numerous Move like oars on a boat Ciliates.
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Cilia and Flagella Flagella
Long and usually one or two long Spin or a wavelike motion from base to tip Flagellates.
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Passive Movement
Depend on air or water currents and other organisms to carry them around
Spores Reproductive cells that can enter the cells of other
organisms and live as parasites.
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Protist Reproduction
Asexually by mitosis Combine asexual and sexual forms of
reproduction.
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Cell Division
Many use mitosis Allows rapid reproduction Produces genetically identical cell, which limits the
genetic diversity.
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Conjugation
Two organisms exchange genetic material Not a type of reproduction because no new
individuals are formed Sexual process because new combinations of
genetic information are produced.
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Macronucleus Multiple copies of genes
the cell uses in its day-to-day activities
Micronucleus “Reserve copy” of every
gene in the cell.
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Alternation of Generations
Alternate between a diploid and a haploid phase.
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Water molds grow into long branching filaments.
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Sporangium Structure that produces spores asexually.
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Reproduce sexually by meiosis and form male and female structures
Haploid nuclei fuse during fertilization, forms a zygote and begins a new life cycle.