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6 Cards in this Set
- Front
- Back
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Protista? |
is the most poorly defined kingdom under the domain eukarya |
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Protista |
Most are microscopic BUT can be multicellular, can be colonies, can be several meters long |
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Characteristics believed to be common to Ancestor of All Eukaryotes? |
-Cells with a nucleus surrounded by a nuclear envelope with nuclear pores -Mitochondria or some remnant of mitochondria -Some form of cytoskeleton -Flagella or cilia (or ancestors that had them) -Chromosomes with DNA wrapped around histones -Mitosis- all perform it -The ability to reproduce sexually -Ability to make cell wall |
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The theory of how eukaryotes evolved\ |
Endosymbiosis, endosymbiotic Theory- when one cell engulfs another, they survive , they benefit, eventually become dependent on one another, can't survive separately |
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Mitochondria |
Have their own, circular DNA, maybe came from another organism Divide on their own from preexisting mitochondria Second membrane most likely from a vacuole that engulfed Come from aerobic bacteria |
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Chloroplasts |
Came from cyanobacteria that could do photosynthesis that was engulfed by another cell, because it has a double membrane Has own circular DNA maybe came from another organism Chloroplasts self replicate, maybe once divided on their own |
