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NAME: __________________________________________________ DATE: ________________________ CLASS: ________________________________________________________ EQ: ______________________________________________________________________________________ Cells QUESTIONS/ MAIN IDEA Fun Facts: The average human being is composed of around _________ trillion individual cells! It would take as many as _____ cells to cover the area of a dot on the letter “i.” Cell: the _________________ _________ of life that can perform ________ life processes. The History of the Cell: 1. Robert Hooke: Used the first _______________ (magnifying glass) to look at dead cork cells from bark of oak trees. He was not looking at living cells when he gave them the name “_________.” It was ________ years later before the term cell took on its current meaning. 2. Anton Van Leeuwehoek: Developed the first simple ________________ that we recognize today. He observed tiny living things in pond water. He called them “___________________.” He also discovered _______________ and looked at ______________________. 3. Robert Brown: He observed that many cells have a dark structure near the ______________ of the cell which we now call the _______________. 4. Matthias Schleiden: He studied ________________ as a hobby and concluded that _____________ are made up of ______________. He is the cofounder of the ______________. 5. Theodor Schwann: He concluded that ________________ are made up of cells. He was a cofounder of the Cell Theory. Other major contributions include his discovery of _____________ cells and the digestive enzyme, ______________. 6. Rudolph Virchow: He proposed that cells come from ___________ ________. This completes the Cell Theory. He is considered the “____________________________________” and the founder of “____________________________.” 7. Janet Plowe: She discovered that the ___________________________ is a physical structure of the cell and not an interface of two liquids. 8. Lynn Margulis: She proposed a theory that certain organelles were once ________ ____________ cells themselves. The Cell Theory 1. All ___________ _________ are composed of __________. 2. ____________ are the __________ _______ of _________________ and _______________ in living things. 3. New cells are _______________ from __________________ cells. Modern Cell Theory: Modern Cell Theory contains _____ statements, in addition to the original Cell Theory: 1. The cell contains _______________________________ (DNA) which is passed on from cell to cell during _________________________. 2. All cells are basically the same in _____________________________________ and _____________________________________. 3. All basic ____________________ and _____________________ functions are carried out inside the cells. (movement, digestion, etc.) 4. Cell activity depends on the activities of ______-__________________ structures within the cell (organelles, nucleus, plasma membrane) Scientists Divide Cells into TWO Categories: Prokaryotic Cells _____ nucleus, only genetic Eukaryotic Cells material Have a _______ ______________ _______________ and ________________ but not other organelles Example: __________________ Have a cell membrane, cytoplasm and _________________ Can be ________________ or ___________________ Very __________ organisms but can carry out all life processes _______________ surrounded by a Examples: Plants, _________________, Fungi, and ____________________ Summary: SUMMARY