The arrangement of various taxa in a hierarchical order is called taxonomic hierarchy.
In this hierarchy, species is present at the lowest level whereas kingdom is present at the highest level.
Classification of a plant
As an example, let us classify Solanum melongena (Brinjal).
Kingdom - Plantae
Division - Angiospermae
Class - Dicotyledonae
Order - Solanales
Family - Solanaceae
Genus - Solanum
Species - melongena.
Classification of an animal
As an example, let us classify Columba livia (Blue rock Dove).
Kingdom - Animalia
Phylum - Chordata
Class - Aves
Order - Columbiformes
Family - Columbidae
Genus - Columba
Species - livia.
Column I | Column II | ||
a. | Herbarium | i. | It is a place having a collection of preserved plants and animals. |
b. | Key | ii. | A list that enumerates methodically all the species found in an area with brief description aiding identification. |
c. | Museum | iii. | Is a place where dried and pressed plant specimens mounted on sheets are kept. |
d. | Catalogue | iv. | A booklet containing a list of characters and their alternates which are helpful in identification of various taxa. |
Figures 9.20(a) and (b) refer to the steady flow of a (non-viscous) liquid. Which of the two figures is incorrect ? Why ?