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Reproduction in Protists

Reproduction in Protists. GPS and EQ. GPS.07.SC.C.S7L3.b.  - Compare and contrast that organisms reproduce asexually and sexually (bacteria, protists, fungi, plants & animals). E.Q.: How do protists reproduce?. Characteristics of Protista. Eukaryotic (have a nucleus) Usually Single Celled

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Reproduction in Protists

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  1. Reproduction in Protists

  2. GPS and EQ • GPS.07.SC.C.S7L3.b. - Compare and contrast that organisms reproduce asexually and sexually (bacteria, protists, fungi, plants & animals). • E.Q.: How do protists reproduce?

  3. Characteristics of Protista • Eukaryotic (have a nucleus) • Usually Single Celled • Live in moist environments • Reproduce asexually or sexually

  4. Three Groups of Protists • Plant-like: Algae • Fungus-Like: Water Molds, Slime Molds • Animal-Like: Protozoa

  5. Asexual Asexual reproduction occurs by mitosis. Sexual Sexual Sexual reproduction involves the exchange of genetic material across a cytoplasmic bridge. Sexual reproduction involves the exchange of genetic material across a cytoplasmic bridge. Protist Reproduction

  6. Mitosis: Asexual Reproduction

  7. Sexual Conjugation • Protists can also transfer DNA BETWEEN 2 protist cells (called conjugation). • Protists can also transfer DNA BETWEEN 2 protist cells (called conjugation).

  8. What happens in meiosis? Meiosis: Sexual Reproduction • The events in meiosis are smooth and continuous: • Chromosomes double and thicken. • Nuclear membrane disappears. • Homologous chromosomes line up a the cell’s center. • Spindle fibers attach. • The nuclear membrane reforms. • Two cells form that are identical and diploid.

  9. What happens in meiosis? • In the second division, the chromosomes do not double. • Chromosomes thicken and line up at cell’s center. • Spindle fibers attach. • Chromosomes are pulled to opposite side of cell by spindle fibers. • Four new cells form when the nuclear membranes reform and cells separate. • The four new cells are unique and haploid so they have half the number of chromosomes compared to starting cells.

  10. Summary: Compare and Contrast Reproduction in Bacteria and Protists

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