BIO 1130 Lecture Notes - Lecture 10: Amoeboid Movement, Proterozoic, Chemosynthesis
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BIO 1130 Full Course Notes
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9+2 organization: at some point in time, instead of having random cytoplasmic extension by the microtubules, the microtubules arranged themselves in a highly fixed array that we associate with flagella and cilia which is called the 9+2 organization. 9 doublets around the outside, and 1 doublet in the middle. Alternation of generations: type of life cycle, where the haploid and diploid stage are both dominant. Fern example: through fertilization and meiosis it is in a diploid stage, and in mitosis it is in a haploid phase. Amoeboid movement: flow of cytoplasm, outer ring of cytoplasm is called ectoplasm (the gel) and the inner one is called sal. At the tip of the amoeba, the cytoplasm is flowing forward and there is a cap there that causes it to reflect backwards. When it reflects backwards, it goes from the liquid to more solid with a polymerization in the cytoplasm.
