Modes of Nutrition Test #2

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Question

Answer

autotrophism

uses inorganic carbon sources (CO2)

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photosynthetic autotroph

energy source is from light; utilize photosynthetic pigments to trap light; light energy is converted to chemical energy (ATP) ex. all green plants and algae, some bacteria; green and purple sulfur bacteria and cyanobacteria;

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chemosynthetic autotroph

energy source is from the breakdown of inorganic chemicals ex. some bacteria

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heterotrophism

requiring organic chemicals as a carbon source

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photosynthetic heterotroph

use light as energy source; rare mode; ex. few bacteria; green and purple nonsulfur bacteria

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chemosynthetic heterotrophs

energy source is from the breakdown of organic chemicals; several sources for these organic chemicals: holotrophism, parasitism, and saprophytism

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holotrophism

ingesting other organisms ex. most animals

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parasitism

gradually drawing nutrients from a living host organism ex. many bacteria, fungi, protozoa, a few animals

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saprophytism

digesting dead organism or decaying matter ex. many bacteria and fungi

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Created by: lisaanne11