(i) ‘Dogs’, ‘Cats’, ‘Mammals’, ‘Wheat’ is taxa: Correct. Taxa (plural of taxon) represent units of classification at different levels, including species (dogs, cats, wheat) and classes (mammals).

(ii) Processes of characterization, identification, classification and nomenclature are basic to taxonomy: Correct. These are the four foundational steps of taxonomy.

(iii) In early days classification based on evolutionary relationships between organisms: Incorrect. Early classification systems were based on the uses of organisms (e.g., food, shelter), while modern classification (systematics) is based on evolutionary relationships.

(iv) Linnaeus used System Nature as title of his publication: Incorrect. The title of his publication was Systema Naturae. While very close, "System Nature" is not the correct Latin title.

(v) Systematics include identification, nomenclature and classification on the basis of evolutionary relationships between organisms: Correct. Systematics, in addition to taxonomy, includes evolutionary studies to define relationships.

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