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...  5. If a mouse and a small lizard of the same mass (both at rest) were placed in experimental chambers under identical environmental conditions, which animal would consume oxygen at a higher rate? Explain. ...
Table of Contents Chapter 22
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... • In the 1800s, French scientist Louis Pasteur did experiments that led people to accept the germ theory. The germ theory states that microorganisms can cause disease. • Pasteur showed how microorganisms affected food, drinks, animals, and people. Microorganisms are tiny living things, such as bacte ...
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... • The individual thread like strands of cells are called hyphae. • Cell wall made of chitin a carbohydrate (same compound as exoskeleton of insects!!!!!) ...
2006 MCAS Sample Student Work and Scoring
2006 MCAS Sample Student Work and Scoring

... and eventually travels to a cell through even smaller blood vessels called capillaries. The walls of capillaries are in very close contact with body cells and are only one cell thick to enable quick diffusion of molecules. This is where the transfer of oxygen to the thigh muscle cell happens. The ox ...
advert - Babraham Institute
advert - Babraham Institute

... We are seeking a highly motivated, independent minded, yet collaborative scientist. The successful candidate will undertake an independent project, but integrate the work within the rest of our interactive research teams. The candidate will also support the laboratory infra-structure together with o ...
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... Our final blood part is the platelet As we mentioned, the platelet is actually a fragment of a cell. Therefore it does not have a nucleus. They are also much smaller than both the white and red blood cells. Their role is to help to clot the blood when the body has a wound. ...
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... of new structures. All organisms grow, and different parts of organisms may grow at different rates. Organisms made up of only one cell may change little during their lives, but they do grow. On the other hand, organisms made up of numerous cells go through many changes during their lifetimes. Think ...
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... national cell biology science organizations, particularly interesting and important, as scientists were then separated by the Iron Curtain. Franke says that ECBO's great accomplishment was maintaining contact between cell biologists of the East and the West and getting the countries of Europe to fac ...
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... 2) Lungs, Gills The lungs are specialized organs, made up of cells working together, which filters carbon dioxide and some water out of the blood. The carbon dioxide and water are both waste products of cellular respiration. When you exhale, you are breathing out the carbon dioxide and water that th ...
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... organism alive is divided (division) among the different parts of the body. Each part has a specific job to do and as each part does its special job, it works in harmony with all the other parts. The arrangement of specialized parts within a living thing is sometimes referred to as levels of organiz ...
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Cell theory



In biology, cell theory is a scientific theory which describes the properties of cells. These cells are the basic unit of structure in all organisms and also the basic unit of reproduction. With continual improvements made to microscopes over time, magnification technology advanced enough to discover cells in the 17th century. This discovery is largely attributed to Robert Hooke, and began the scientific study of cells, also known as cell biology. Over a century later, many debates about cells began amongst scientists. Most of these debates involved the nature of cellular regeneration, and the idea of cells as a fundamental unit of life. Cell theory was eventually formulated in 1838. This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow contributed to the theory. Cell theory has become the foundation of biology and is the most widely accepted explanation of the function of cells.The three tenets to the cell theory are as described below: All living organisms are composed of one or more cells. The cell is the most basic unit of life. All cells arise from pre-existing, living cells, by biogenesis.
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