Male System The structure and function of the human male reproductive system‚ is very similar to that of many other mammals. The male system is designed to make sperm or male gametes and is adapted to provide for the delivery of these gametes to the female to allow for fertilization. Male Reproductive System Male Reproductive System Structures 1. testes -- produces sperm and the hormone testosterone 2. scrotum -- pouch enclosing the testes keeping the sperm at an optimum temperature
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Nagai‚ H. and Takata‚ Y. J. Org. Chem.‚ 44(20)‚ 3519-3523 (1979). (11) Iglesias‚ E. J. Org. Chem.‚ 68(7)‚ 2680-2688 (2003). 3.3 cm (0.3×11 protons) of the 4.6 cm intergral height was assigned to the enol structure. Enol % = 3.3/4.6 × 100 = 71.7%‚ Keto % = (4.6-3.3)/4.6 × 100 = 28.3%. The enol structure was the major form of 2-acetylcyclohexanone‚ same as the Pavia et al [1] and Igiesias [11]. The reason for obtaining more enol form (71.7 %) than keto form (28.3 %) of 2-acetylcyclohexanone can be explained
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Biology Notes: Threats to biodiversity in MA 1. Climate change: temp‚ sea levels‚ precipitation 2. Non climate threats such as habitat loss‚ habitat fragmentation‚ and invasive species and air and water pollution Fragmentation: often due to man (dams‚ roads‚ and general development) Elements of biodiversity: Species‚ ecosystems & landscapes Mammals from bats to bears Bats got the white nose fungus which caused the bats to die and the insect population flourished because the bats main job
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Stem Cell Niche and the Function of the Rac1 protein within the niche. Abstract: An adult stem cell’s niche is responsible for the preservation of the stem cell’s undifferentiated state through either intrinsic or extrinsic expression of specific proteins (Scadden‚ 2006). Situated in the bulge of the hair follicle‚ hair follicle stem cells (HFSC) are quiescent in nature and are responsible for not only its self renewal but also in the production of rapidly proliferating cells. These cells are
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concentration of product Increased concentration of substrate A change in pH Temporary binding of a non-substrate molecule in the active site Which of the following statements is accurate in describing the activity of the lactase enzyme Lactase can function equally effectively at many different pH levels The shape of lactase does not change during the reaction Lactase is converted to glucose and galactose by the reaction One lactase enzyme can catalyze many reactions Look up and write in the following
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The term biology is derived from the Greek word βίος‚ bios‚ "life" and the suffix -λογία‚ -logia‚ "study of."[4] The Latin form of the term first appeared in 1736 when Linnaeus (Carl von Linné) used biologi in his Bibliotheca botanica. It was used again in 1766 in a work entitled Philosophiae naturalis sive physicae: tomus III‚ continens geologian‚ biologian‚ phytologian generalis‚ by Michael Christoph Hanov‚ a disciple of Christian Wolff. The first German use‚ Biologie‚ was used in a 1771 translation
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Biology Reviewer I. Definition of the cell -Cell is the basic unit/structure of life II. History of cell A. (1665) Robert Hooke- discovered the cell and he established the drawing of a cork cell B. (1674) Anton van Leeuwenhoek- observed red blood cell and myriad in a single cell organism in Pond water -discovered
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Cell Theory In biology‚ cell theory is a scientific theory that describes the properties of cells‚ the basic unit of structure in every living thing. The initial development of the theory‚ during the mid-17th century‚ was made possible by advances in microscopy; the study of cells is called cell biology. Cell theory states that new cells are formed from pre-existing cells‚ and that the cell is a fundamental unit of structure‚ function and organization in all living organisms. It is one of the
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Biology of Mind Modules 4‚ 5 and 6 * Everything psychological is simultaneously biological * Plato correctly located the mind in the spherical head * Aristotle believed mind was in the heart * Although heart is the symbol for love‚ psychology has proven that you fall in love using your brain * 1800s Franz Gall (German psychologist) invented phrenology theory that claims that bumps on our skull could reveal our mental ability and character traits * Biological
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Biology HL -Functions of the Liver Essay The liver receives its blood from two main sources; the hepatic artery and the hepatic portal vein. The hepatic artery transports oxygenated blood from the left side of the heart through the aorta to the liver. The deoxygenated blood from the liver is drained back out through the hepatic vein which returns it to the vena cava. The hepatic portal vein carries nutrient rich blood from the small intestine to the liver. Its blood however
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