Explain the term Taxa, Taxonomy and systematics. 

Explanation

Taxa : Each category referred to as a unit of classification in fact represent a rank and is commonly termed as taxon. (Pl. taxa).
Dogs, .Cats., .Mammals, Wheat, Rice, Plants, Animals etc. are convenient categories we use to study organisms.
The scientific term for these categories is taxa.
Taxa can indicate categories at very different levels.
 .Plants. also form a taxa, wheat is also a taxa.
Similarly .animals., .mammals., .dogs. are all taxa-but dog is a mammal and mammals are animals.
Therefore animals., .mammals. and .dogs. represent taxa at different levels.
Taxonomy : Based on characteristics all living organisms can be classified into different taxa.
This process of classification is called taxonomy.
External and internal structure, along with the structure of call, development process and ecological information of organisms are essential and form the basis of modern taxonomic studies.
Characterisation, identification, classification and nomenclature are the processes that are basic to taxonomy.
The earliest classification were based on the .uses of various organisms.
Systematics : Human beings were not only interested in knowing more about different kinds of organisms and their diversities, but also the relationships among them.
This branch of study was referred to as systematics.
The word systematies is derived from the Latin word .systema. which means systematic arrangement of organisms.
Linnaeus used Systema Naturae as the title of his publication.
The scope of systematics was later enlarged to include identification, nomenclature and classification.