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Bio 3 Concepts, cancer, infection, nutrition, chemistry, diversity,…
Bio 3 Concepts
Evolution
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Natural Selection
These genetic correlations between traits result from a combination of evolutionary forces, chiefly mutations jointly influencing multiple traits, and natural/sexual selection favoring some combinations of trait values
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Evolution is the process by which populations of organisms change over generations. Genetic variations underlie these changes.
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Infection and Immunity
Malnutrition can make a person more susceptible to infection, and infection also contributes to malnutrition, which causes a vicious cycle
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Nutrition
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Carbohydrates
Carbohydrates are made up of monosaccharides linked together into polysaccharide chains by a type of covalent bond known as a glycosidic bond. These glycosidic bonds are formed in a dehydration synthesis reaction.
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Nutritional scientists discover the health effects of food and its nutrients by first making an observation. Once observations are made, they come up with a hypothesis, test their hypothesis, and then interpret the results.
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Cancer
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Genetic changes that cause cancer can be inherited or arise from certain environmental exposures. Genetic changes can also happen because of errors that occur as cells divide.
DNA
The sex chromosomes form one of the 23 pairs of human chromosomes in each cell. The Y chromosome spans more than 59 million building blocks of DNA
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some infections weaken the immune system, making the body less able to fight off other cancer-causing infections. And some viruses, bacteria, and parasites also cause chronic inflammation, which may lead to cancer
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Chemistry and Metabolism
Metabolism is the chemical process your body uses to transform the food you eat into the fuel that keeps you alive. Nutrition (food) consists of proteins, carbohydrates, and fats. These substances are broken down by enzymes in your digestive system, and then carried to the cells where they can be used as fuel.
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Atoms
All matter—all solids, liquids, and gases, including the matter in living things—is made of atoms
All food is made up of chemical substances. Chemicals in food are largely harmless and often desirable – for example, nutrients such as carbohydrates , protein , fat and fibre are composed of chemical compounds
The Diversity of Life
Evolution and diversity result from the interactions between organisms and their environments and the consequences of these interactions over long periods of time. Organisms continually adapt to their environments, and the diversity of environments that exists promotes a diversity of organisms adapted to them.
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The Scientific Process
it was through standard, rigorous applications of the scientific method that scientists came to their current understanding of the evolutionary process. Science investigations begin with one or more questions about phenomena observed in the natural or physical world.
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