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Living Systems
Living Systems

... What is it called when scientists put organisms into groups based on how they are alike and different? ...
Slide 1
Slide 1

... •small dot-like structures in cells •they are often associated with forming rough ER •Ribosomes are the site of protein synthesis in cells •they are made in the nucleus of the cell •A ribosome can make the average protein in ...
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Unit 4: Cells
Unit 4: Cells

Unit 4: Cells
Unit 4: Cells

... 5. Identify in a diagram and describe the functions of cellular organelles. a. Nucleus: controls the cell’s activities and contains DNA. b. Nucleolus: located inside the nucleus, makes the ribosomes for the cell. c. Nuclear Membrane: bilipid layer that surrounds the nucleus. d. Ribosomes: make prote ...
Cells Alive! www.cellsalive.com/cells/3dcell.htm For this project you
Cells Alive! www.cellsalive.com/cells/3dcell.htm For this project you

... Roll your pointer over the different organelles of the Animal Cell. Notice what each organelle looks like and where it is located in the cell. 2. Click on Nucleus. The nucleus is the most obvious organelle in a eukaryotic cell. a. What is found inside the nucleus? _____________ b. DNA is similar in ...
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... Peroxisomes: contain _____________ that function in the synthesis of bile acids, breakdown of lipids, degradation of rare biochemicals, and detoxification of alcohol. Microfilaments and microtubules: are threadlike structures that serve as the cytoskeleton of the cell. Microfilaments, made of the pr ...
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1827: ROBERT BROWN DISCOVERED THAT POLLEN

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1.2 microscopes and cell parts

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Cytoplasm is where all the chemical reactions take
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... • Every prokaryotic and eukaryotic cell is surrounded by the cell membrane. It helps to maintain homeostasis in the cell by functioning as a protective barrier between the cell and its environment. • The cell membrane is selectively permeable which means it allows only certain substances in and cert ...
Cell Organelle Quiz
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Common Characteristics of cells

... The endoplasmic reticulum (ER) is a membranous labyrinth so extensive that it accounts for more than half of the total membrane in many eukaryotic cells. The ER consists of network membranous tubules and sacs called cistternae The ER membrane in many eukaryotic separates its internal part from cytos ...
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CELL ORGANELLES
CELL ORGANELLES

... lysosome is a structure inside an animal cell which breaks down materials into compounds which can be used or discarded by the cell, as needed.   Each lysosome produces an assortment of digestive enzymes which it uses to break down food and waste material.   Lysosomes also play other important rol ...
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... near the nucleus. They contain the CENTRIOLES which are believed to form spindle fibers during cellular division. ...
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Meiosis & Mitosis process

... cells (sperm and egg) by which the number of chromosomes is reduced by half. Chromosomes make copies of themselves. Then they line up in the middle of the cell side by side. Then they move to opposite ends of the cell. Then two new cells are formed. Then they line up in the center of the cell again. ...
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Endomembrane system

The endomembrane system is composed of the different membranes that are suspended in the cytoplasm within a eukaryotic cell. These membranes divide the cell into functional and structural compartments, or organelles. In eukaryotes the organelles of the endomembrane system include: the nuclear membrane, the endoplasmic reticulum, the Golgi apparatus, lysosomes, vesicles, endosomes and the cell membrane. The system is defined more accurately as the set of membranes that form a single functional and developmental unit, either being connected directly, or exchanging material through vesicle transport. Importantly, the endomembrane system does not include the membranes of mitochondria or chloroplasts.The nuclear membrane contains two lipid bilayers that encompass the contents of the nucleus. The endoplasmic reticulum (ER) is a synthesis and transport organelle that branches into the cytoplasm in plant and animal cells. The Golgi apparatus is a series of multiple compartments where molecules are packaged for delivery to other cell components or for secretion from the cell. Vacuoles, which are found in both plant and animal cells (though much bigger in plant cells), are responsible for maintaining the shape and structure of the cell as well as storing waste products. A vesicle is a relatively small, membrane-enclosed sac that stores or transports substances. The cell membrane, is a protective barrier that regulates what enters and leaves the cell. There is also an organelle known as the Spitzenkörper that is only found in fungi, and is connected with hyphal tip growth.In prokaryotes endomembranes are rare, although in many photosynthetic bacteria the plasma membrane is highly folded and most of the cell cytoplasm is filled with layers of light-gathering membrane. These light-gathering membranes may even form enclosed structures called chlorosomes in green sulfur bacteria.The organelles of the endomembrane system are related through direct contact or by the transfer of membrane segments as vesicles. Despite these relationships, the various membranes are not identical in structure and function. The thickness, molecular composition, and metabolic behavior of a membrane are not fixed, they may be modified several times during the membrane's life. One unifying characteristic the membranes share is a lipid bilayer, with proteins attached to either side or traversing them.
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