Animals, dogs and mammals represent

1. Taxa at different levels

2. Taxonomic hierarchy

3. Taxa at equivalent level

4. Categories at equivalent level

Study of diversity of organisms and evolutionary relationship amongst them on the basis of all possible characters is called as

1 Taxonomy

2 Systematics

3 Alpha-taxonomy

4 Phylogeny

First step of taxonomy is

1 Classification

2 Nomenclature

3 Identification

4 Characterisation

Practical purpose of taxonomy or classification is to:
1. facilitate the identification of unknown species
2. explain the origin of organisms
3. know the evolutionary history
4. identify medicinal plants

The term ‘systematics’ refers to
1.  identification and study of organ systems

2.  identification and preservation of plants and animals

3.  diversity of kinds of organisms and their relationship

4.  study of habitats of organisms and their classification

Biosystematics aims at: