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How do baby animals grow to be adults?
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Why do animals shed their skin?
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Cells divide for three purposes:
Growth of the organism Repair damaged structures Asexual reproduction
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The Cell Cycle - Mitosis
A cell grows, prepares for division, and then divides into two new cells. These two new cells, called daughter cells, are identical to the parent cell because they have the same DNA as the parent cell.
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3 stages of the Cell Cycle:
Interphase Mitosis Prophase Metaphase Anaphase Telophase Cytokinesis
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Interphase Cell spends most of its life in this phase
The cell grows to its full size DNA is copied in the nucleus of the cell Cell prepares to divide
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Interphase
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Prophase 1st and longest phase of Mitosis Chromosomes become visible
Centrioles separate and move to opposite ends of cell Spindle fibers appear Nuclear membrane disappears
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Prophase
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Metaphase 2nd and shortest phase of Mitosis
Chromosomes attach to spindle fibers in center of cell
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Metaphase
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Anaphase 3rd phase of Mitosis
Centromeres split apart and chromatids separate from each other. Chromosomes move to opposite poles
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Anaphase
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Telophase 4th and last phase of Mitosis
Chromosomes reach opposite poles of cell Chromatids unwind back into chromatin Nuclear membranes begins to form around the chromatin at each end Spindle fibers disappear
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Telophase
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Cytokinesis New cell membrane forms between two nuclei.
The cell splits into two new cells – each with identical chromosomes.
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Cytokinesis
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Mitosis Review Interphase Prophase Metaphase Anaphase Telophase
Cytokinesis
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IPMATC REMEMBER! Interphase Prophase Metaphase Anaphase Telophase
Cytokinesis A mnemonic to help remember the stages of mitosis. I Play Music At The Church
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