Snails are grouped in the gastropoda, which is part of the mollusk

Snails are grouped in the Class gastropoda, which is part of the mollusk phylum

Explanation:

The snails are the gastropods which forms the majority of this group class. The class gastropoda falls in the phylum mollusca which is part of animal kingdom as an invertebrates.

there are six kingdoms divided on the basis of classification given by Whitaker. One of those kingdoms is the animal kingdom, which is further divided into invertebrates and vertebrates. both of them are divided into several phylum which are then divided into classes and subclasses to the order to genus and species, in the taxonomical grouping or classification.

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step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.