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2D Elevate Science

Topic 2 The Cell Systems Lesson 4 Cell Division

What is the function of cell division? it makes new "daughter cells"; it repairs damage; it replaces old/dead cells
What does cell division allow? it allows organisms to grow larger
What do unicellular organisms do through cell division? they make new organisms
What do multicellular organisms do through cell division? they grow larger and develop new structures as cells reproduce
What is the 1st stage of the cell cycle? Interphase
What happens during Interphase? the cells grows, copies DNA and prepares to divide
Define "growing" as it relates to the cell cycle. the cell gets bigger; it makes more organelles
Define "replication" as it relates to the cell cycle. the cell makes a copy of the DNA in the nucleus; each new cell will have a complete set of chromosomes
Explain "preparing for cell division" as it relates to the cell cycle. an animal cell produces structures called centrioles, which help divide the DNA
What is the 2nd stage of the cell cycle? Mitosis
What happens during Mitosis? the nucleus divides into 2 nuclei
What happens during Prophase? DNA condenses into separate chromosomes; each with a pair of identical chromatids; the nuclear membrane begins to break down
What happens during Metaphase? the chromosomes line up along the middle of the cell; each chromatid will go to a new daughter cell
What happens during Anaphase? fibers from the centrioles will pull chromatids apart
What happens during Telophase? chromatids are on each side of the cell; the nuclear membrane begins to re-form around DNA
What is the final stage of the cell cycle? Cytokinesis
What happens during Cytokinesis? cytoplasm and organelles divide equally and the cell splits into two daughter cells
What happens during Cytokinesis in Animal Cells? the cell membrane sqeezes and pinches off
What happens during Cytokinesis in Plant Cells? the cell plate forms along the center, creating a new cell membrane an dcell wall for each new cell
Created by: carlsond



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