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What part do (a) nitrifying, (b) nitrogen-fixing and (c) denitrifying bacteria play in the nitrogen cycle?
a) Nitrifying bacteria in the soil change ammonia and other nitrogenous substances (e.g.urea) into nitrates.
b) Nitrogen-fixing bacteria (in the soil or in root nodules) convert gaseous nitrogen into nitrogenous compounds.
c) Denitrifying bacteria in the soil, decompose nitrogenous compounds to make gaseous nitrogen
SHORT COMING OF CELL THEORY / EXCEPTIONS OF CELL THEORY (i) Viruses can be considered as exception to cell theory. They are made of proteins and ones of nucleic acid i.e.
Rhinosporidiosis (Fungal-like agent) Rhinosporidiosis is a chronic, non-fatal, granulomatous mycotic infection of nasal mucosa caused by Rhinosporidium seberi. R. seberi is curren
Under which forms is the Trypanosoma cruzi found in its hosts? In the definitive hosts as well as in triatomine bugs (middle hosts) the protozoan that causes Chagas' disease ch
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What classifies an animal into the Echinodermata phylum?
Female Reproductive Tract The female reproductive tract involves the fallopian tubes, uterus and vagina. Look at diagram. You would notice that the ovaries lay one on each si
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