Autotrophs

Autotrophs are organisms that produce their own organic compounds using carbon dioxide from the air or water in which they live. To do this they require an external source of energy.
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Autotrophs are a vital part of the food chain. They take energy from the sun or from inorganic sources and convert it into a form (organic molecules) that they use to carry out biological functions including cell growth; ...
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autotrophs
An organism able to build all the complex organic molecules that it requires as its own food source, using only simple inorganic compounds. Plants, and some bacteria are autotrophs.
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autotrophs Organisms that synthesize their own nutrients; include some bacteria that are able to synthesize organic molecules from simpler inorganic compounds.
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Photoautotrophs - plants, algae, and some bacteria - use light as the source of the needed energy. [Photosynthesis]
Chemoautotrophs use the energy secured by oxidizing some inorganic substance in their surroundings.
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Identify autotrophs, heterotrophs, decomposers in an ecosystem.
Identify a food chain within a food web.
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These bacteria are obligate autotrophs"they obtain all of their carbon for growth from CO2, and obligate chemolithotrophs"they derive all their reducing power and energy necessary for biosynthesis from the transformation of NH3 to NO2-.
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Carbon dioxide dissolved in the ocean is their source of carbon; they are autotrophs. Organic material from decomposing phototrophs is not abundant, so these organisms rely on inorganic sources for energy.
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Because they interact with light to absorb only certain wavelengths, pigments are useful to plants and other autotrophs --organisms which make their own food using photosynthesis.
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net primary production The total energy converted into biomass by autotrophs. Net primary production is equal to gross primary production less energy lost in maintenance functions of autotrophs.
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A diagram of the energy flow between the trophic levels of an ecosystem; plants or other autotrophs (at the base of the pyramid) represent the greatest amount of energy, herbivores next, then primary carnivores, secondary carnivores, etc.
pyrimidine ...
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