1. Explain How does conjugation produce genetic diversity in a population of Paramecium 2. Compare...
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Transcript of 1. Explain How does conjugation produce genetic diversity in a population of Paramecium 2. Compare...
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
CH 21 PROTISTS AND FUNGI21.2 Protist Structure and Function
How Protists Move
Change their cell shape Specialized organelles Do not actively move.
Amoeboid Movement
Move by changing their shape Pseudopods
Use of cytoplasmic projections Powered by a cytoskeletal protein- actin.
Cilia and Flagella Cilia
Short and numerous Move like oars on a boat Ciliates.
Cilia and Flagella Flagella
Long and usually one or two long Spin or a wavelike motion from base to tip Flagellates.
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.
Protist Reproduction
Asexually by mitosis Combine asexual and sexual forms of
reproduction.
Cell Division
Many use mitosis Allows rapid reproduction Produces genetically identical cell, which limits the
genetic diversity.
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.
Macronucleus Multiple copies of genes
the cell uses in its day-to-day activities
Micronucleus “Reserve copy” of every
gene in the cell.
Alternation of Generations
Alternate between a diploid and a haploid phase.
Water molds grow into long branching filaments.
Sporangium Structure that produces spores asexually.
Reproduce sexually by meiosis and form male and female structures
Haploid nuclei fuse during fertilization, forms a zygote and begins a new life cycle.