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Cells

Cells. The Basic Unit s of Living Things. Organization of Life. Cells: start out small; basic unit of living things Tissues: cells working together Organs: two or more tissues working together Organ System: organs working together in groups ~ plant leaf ~stomach.

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Cells

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  1. Cells The Basic Unit s of Living Things

  2. Organization of Life • Cells: start out small; basic unit of living things • Tissues: cells working together • Organs: two or more tissues working together • Organ System: organs working together in groups • ~ plant leaf • ~stomach

  3. We all began as… • A single cell Now we are MULTICELLULAR. We are made up of about 100 trillion cells

  4. Cells: • All cells are surrounded by a • cell membrane All cells have DNA. It holds the parts of the cell together. Chromosomes are organized structures of DNA

  5. Unicellular • ~a single cell that is living on its own

  6. Cytoplasm • ~the jelly-like fluid that surrounds everything within the cell ?

  7. Steps of Mitosis • 1. DNA makes a copy of itself • 2. Nuclear membrane breaks down • 3. Chromosomes line up in middle of cell • 4. Chromosomes pulled to opposite ends • 5. Nuclear membrane reforms and two new cells are formed

  8. vacuole mitochondria cell wall chloroplast (holds water) (make energy) (strengthen/support ) (photosynthesis occurs)

  9. Locate:cell membrane, nucleus, and cytoplasm Cell membrane nucleus cytoplasm

  10. 10 Question: • If a parent cell has 10 chromosomes before dividing. How many chromosomes will each new cell have after the parent cell divides? • A. 10 • B. 5

  11. Why use stains when looking at cells? Because many slides are clear and would not be visible.

  12. Is this cell eukaryotic or prokaryotic? How do you know? Eukaryotic – it has a nucleus

  13. Is this cell likely to be a plant or animal cell? • Animal Cell • Has NO cell wall • Has NO chloroplasts • Has NO large vacuole

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