Animals
are classified into 2 types : vertebrates and invertebrates. Examples of vertebrates are reptiles, fish, amphibians, birds, and mammals. Invertebrates are
such as protozoa, coelenterates,
flatworms, arthropods, annelid worms, molluscs, and echinoderms.
Arthropods includes arachnids, crustaceans, insects, and
myriapods.
Fertilizers
are classified into 2 groups : organic manures and chemical fertilizers. Examples
of fertilizers are farm manures,
compost, green manures, and vermicompost. Chemical fertilizers are such as
nitrogenous, phosphatic fertilizers, potassic fertilizers, and complex fertilizers.
