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2D Elevate Science
Topic 2 The Cell Systems Lesson 4 Cell Division
Question | Answer |
---|---|
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 |