vocab 6
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| autotroph | An organism capable of synthesizing its own food from inorganic substances using light or chemical energy.
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| hetertroph | an organism deriving its nutritional requirements from complex organic substances.
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| chemoautotrophs | an organism, typically a bacterium, that derives energy from the oxidation of inorganic compounds.
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| photoautotrophs | any organism that derives its energy for food synthesis from light and is capable of using carbon dioxide as its principal source of carbon.
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| calories | unit used to measure energy released by food
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| energy | power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.
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| ingestion | taking in of a substance,
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| digestion | the process of breaking down food by mechanical and enzymatic action in the alimentary canal into substances that can be used by the body.
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| egestion | the discharge or expulsion of undigested material (food) from a cell in case of unicellular organisms, and from the digestive tract via the anus in case of multicellular organisms.
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| roughage | fibrous indigestible material in vegetable foodstuffs that aids the passage of food and waste products through the gut.
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| cellulose | an insoluble substance that is the main constituent of plant cell walls and of vegetable fibers such as cotton. It is a polysaccharide consisting of chains of glucose monomers.
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| body mass index | a weight-to-height ratio, calculated by dividing one's weight in kilograms by the square of one's height in meters and used as an indicator of obesity and underweight.
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| absorption | the process or action by which one thing absorbs or is absorbed by another.
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| diffusion | the spreading of something more widely.
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| villi | any of numerous minute elongated projections set closely together on a surface, typically increasing its surface area for the absorption of substances, in particular.
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| constipation | a condition in which there is difficulty in emptying the bowels, usually associated with hardened feces.
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| enzyme | a substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction.
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| macromolecules | a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer.
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| bulimia | an emotional disorder involving distortion of body image and an obsessive desire to lose weight, in which bouts of extreme overeating are followed by depression and self-induced vomiting, purging, or fasting.
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| anorexia | an emotional disorder characterized by an obsessive desire to lose weight by refusing to eat.
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