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Lesson 1.1.1 Cells
Lesson 1.1.1 Cells

... Cells are very small and cannot be seen with the naked eye; therefore, we need to use a microscope to enlarge the structures. Stains are coloured dyes which are often used see the more structures clearly. Examples of stains include iodine solution and ...
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... Cell City Analogy 2012 A cell is very much like a city because, like a city, each cell has a purpose and components that are needed by other cells or communities. In this activity, you will read the Cell City Analogy, and identify the cell parts that are similar to the underlined parts of the city s ...
LIFEPAC® 5th Grade Science Unit 10 Worktext - HomeSchool
LIFEPAC® 5th Grade Science Unit 10 Worktext - HomeSchool

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to view the core content
to view the core content

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File - Flipped Out Science with Mrs. Thomas!

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... • 1855 Rudolph Virchow - proposes that cells come from existing cells • 1931 Janet Plowe - demonstrates that the cell membrane in a physical structure not just an interface between two liquids. • 1945 World War II ends • 1970 Lynn Margulis - proposes the theory that certain organelles, were once fre ...
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... brown. So both traits are given to the child so that’s why there’s 2 and they might be different. They get passed from the process of heredity and genes contain the traits that are passed to you that tell whether you get your dad or mom’s eyes. They are found in genes. ...
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Chapter 7: CELL STRUCTURE Section 1 – Introduction to Cells
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... a. What are ribosomes made of? RNA & protein b. Where are ribosomes located in the cell? Floating in the cytoplasm/cytosol & attached to the endoplasmic reticulum (ER) c. Which ribosomes make proteins that will stay in the cell? The ribosomes floating in the cytoplasm (free ribosomes). d. Which ribo ...
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... Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
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ell notes - Mathomania

... Shape and Size of Cells:- Cells come in all shapes and sizes. While most of the cells are spherical in shape, cells of various other shapes are also found. Most of the cells are microscopic in size, i.e. it is impossible to see them with naked eyes. Some cells are fairly large, e.g. a neuron in huma ...
Unit I: Organization and Change within Living Organisms: Cells
Unit I: Organization and Change within Living Organisms: Cells

... examples. Recognize specific processes organisms do to maintain homeostasis including extracting energy from food, getting rid of waste, and reproducing. 3. Recognize specific processes organisms do to maintain homeostasis including extracting energy from food, getting rid of waste, and reproducing. ...
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week5b_Cells.bak

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Amitosis

Amitosis (a- + mitosis) is absence of mitosis, the usual form of cell division in the cells of eukaryotes. There are several senses in which eukaryotic cells can be amitotic. One refers to capability for non-mitotic division and the other refers to lack of capability for division. In one sense of the word, which is now mostly obsolete, amitosis is cell division in eukaryotic cells that happens without the usual features of mitosis as seen on microscopy, namely, without nuclear envelope breakdown and without formation of mitotic spindle and condensed chromosomes as far as microscopy can detect. However, most examples of cell division formerly thought to belong to this supposedly ""non-mitotic"" class, such as the division of unicellular eukaryotes, are today recognized as belonging to a class of mitosis called closed mitosis. A spectrum of mitotic activity can be categorized as open, semi-closed, and closed mitosis, depending on the fate of the nuclear envelope. An exception is the division of ciliate macronucleus, which is not mitotic, and the reference to this process as amitosis may be the only legitimate use of the ""non-mitotic division"" sense of the term today. In animals and plants which normally have open mitosis, the microscopic picture described in the 19th century as amitosis most likely corresponded to apoptosis, a process of programmed cell death associated with fragmentation of the nucleus and cytoplasm. Relatedly, even in the late 19th century cytologists mentioned that in larger life forms, amitosis is a ""forerunner of degeneration"".Another sense of amitotic refers to cells of certain tissues that are usually no longer capable of mitosis once the organism has matured into adulthood. In humans this is true of various muscle and nerve tissue types; if the existing ones are damaged, they cannot be replaced with new ones of equal capability. For example, cardiac muscle destroyed by heart attack and nerves destroyed by piercing trauma usually cannot regenerate. In contrast, skin cells are capable of mitosis throughout adulthood; old skin cells that die and slough off are replaced with new ones. Human liver tissue also has a sort of dormant regenerative ability; it is usually not needed or expressed but can be elicited if needed.
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