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Bell Work 8/18/09 1. Why do you think the invention of the microscope was important? If you haven’t finished your reading from yesterday p.9-15, please continue reading. Remember you need to list 3 things you learned from the reading in the notes section of your journal. Characteristics of Life 1. 2. 3. 4. Organization The ability to develop and grow The ability to respond to the environment The ability to reproduce The Cell All living things are made of cells. The cell is the smallest unit of a living thing. The cell is the basic unit of function in an organism. What activities that plants and animals do are carried out by cells? The Cell Theory 1. 2. 3. Every living thing is made of one or more cells. Cells carry out the functions needed to support life. Cells come only from other living cells. Peach Lab P. 15 Louis Pasteur’s experiment Bacteria and Spontaneous Generation Explain peach lab Explain Lab Write Up procedure Bell Work 8/19/09 Please have a seat and get out your homework, I will be by to check it. Fill out the top of the peach lab sheet with your name and hour. Please sit quietly until class starts. Bell Work Without touching the peaches, make observations of the peach in the bag and the peach exposed to air. Vocab 1.2 Cell membrane (p.20) – a protective covering enclosing an entire cell. A layer that controls what enters or leaves the cell. Cytoplasm (p.20) – A thick, gelatin-like material contained within the cell membrane. Most of the work of the cell is carried out here. Eukaryotic cell (p.20) – a cell in which the genetic material is enclosed within a nucleus, surrounded by its own membrane. (most multicellular organisms) Nucleus (p.20) – The structure in a eukaryotic cell that contains the genetic material a cell needs to reproduce and function. Organelle (p.20) – A structure in a cell that is enclosed by a membrane and that performs a particular function. Prokaryotic cell (p.20) – A cell without a nucleus and without organelles. Genetic material is in the cytoplasm. (most unicellular organisms) Cell wall (p.21) – Only plant cells have these. A tough outer covering that lies outside the cell membrane. Chloroplast (p.23) – An organelle in a plant cell that contains chlorophyll, a chemical that uses the energy from sunlight to make sugar. Mitochondria (p.23) – Organelles that release energy by using oxygen to break down sugars. Found in plant and animal eukaryotic cells.