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Photosynthesis and Respiration
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Photosynthesis: plant cells making glucose for energy
light 6 CO H2O → C6H12O O2 carbon water glucose oxygen dioxide
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This process is the opposite of respiration
This process is the opposite of respiration. It stores energy from the sun in the form of food.
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Respiration: all cells release energy when they “burn” fuel/food
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This process is the opposite of photosynthesis.
Respiration RELEASES energy from fuel/food.
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Mitosis Meiosis
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Mitosis is the process in which the nucleus divides to form two new nuclei. produces two daughter cells that are identical to the parent cell.
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Animated Mitosis Cycle
Interphase Prophase Metaphase Anaphase Telophase & Cytokinesis
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Interphase Cell prepares for division by:
Parent Cell Cell prepares for division by: Chromosomes are copied (# doubles) Photographs from:
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Prophase Mitosis begins (cell begins to divide) Nucleus disappears .
Centrioles (or poles) appear and begin to move to opposite end of the cell. between the poles.
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Chromosomes line up in the Middle
Metaphase Chromosomes line up in the Middle
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Chromosomes separate and move to opposite sides.
Anaphase Chromosomes separate and move to opposite sides.
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The cell divides into two. (Two new nuclei form)
Telophase The cell divides into two. (Two new nuclei form) The nucleus re-forms
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Cytokinesis occurs after mitosis
Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.
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Animal Mitosis -- Review
Interphase Prophase Metaphase Anaphase Telophase
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Cell Cycle 17
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- Cell Division The Cell Cycle 18 18
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Mitosis Animation
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Meiosis
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Produces sex cells Sperm eggs Goes through the same phases as mitosis, only it goes it twice Produces 4 new cells Meiosis = half number of chromosomes
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Second Division Prophase II Telophase II Metaphase II
Four cells with half the number of chromosomes as the original cell Anaphase II Daughter Cells
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Summary mitosis: interphase, prophase, metaphase, anaphase, and telophase = 2 cells meiosis: prophase 2, metaphase 2, anaphase 2, and telophase = 4 daughter cells
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