Saprobionts, Extracellular digestion and Saprobiot
Saprobionts are organisms that absorb and digest there food outside of there main body for example Fungi
Fungi use digestive enzymes to breakdown dead or dieing organisms, the enzymes break down cells to allow the saprobiontic organisms to absorb the nutrients it needs. This is extracellular digestion
It all combines to aid saprobiotic nutrition
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Mycorrhizae, Microorganisms and Nitrogen Fixation
Mycorrhizal organisms are organisms that grow in the roots of a plant and assist the plant in the uptake of nutrients and help to defend from other fungi in the soil
Nitrogen Fixation is the process in which Nitrogen is converted into ammonia
Certain microoganisms allow this to occur in the soil in which nitrogen gas is converted into ammonia that plants are able to use to synthesize proteins
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Ammonification, Nitrification and Denitrification
After a plant or animal dies it expels waste in the form of organic nitrogen, certain bacteria and fungai can convert this nitrogen into ammonia this is called ammonification
Nitrification is the oxidation of ammonia to nitrite which is then oxidised to nitrate, this is an important step in the nitrogen cycle in soil
Denitrification is the reduction of nitrates back into nitrogen and the specialsed bacterias use the nitrate as the electron acceptor in the place of oxygen in respiration
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