The organisms/structures that do not have cell organization e.g. viruses, viroids, and prions.

The kingdom includes multicellular heterotrophs that ingest food and digest it in body parts.

The system of naming organisms, in which the name consists of two words i.e. generic name and species name.

The variety of species present in an ecosystem and the variety of organisms in each species.

Ataxon that contains related orders.

The grouping of organisms based on similarities found in them.

Defining the endangered and threatened species and taking measures for their protection.

Cutting down trees and converting forests into non-forest areas.

The species is at risk of becoming extinct because few members are left.

A taxon that contains related genera. 

Fauna can refer to the animal life or classification of animals of a certain region, period, or environment. Fauna is also of Latin origin. In Roman Mythology Fauna was the sister of Faunus, a good spirit of the forest and plains.

By definition, the flora is a word of Latin origin referring to Flora, the goddess of flowers. Flora can refer to a group of plants, a disquisition of a group of plants, as well as bacteria. Flora is the root of the word floral, which means flowers.

Eukaryotic heterotrophs absorb food and contain chitin in their cell walls.

A taxon that contains related species. 

The kingdom includes prokaryotes.

Ataxon that contain related families. 

A taxon contains related classes. 

The kingdom of multicellular eukaryotic autotrophs.

The acellular particles that consists of protein only. 

Loss of topsoil often results from deforestation and wind or water erosion.

The kingdom containing the unicellular, colonial or simple multicellular eukaryotes.

A group of similar organisms that can naturally interbreed among themselves to produce fertile offspring. 

The branch deals with the classification and evolutionary histories of organisms. 

The groups into which organisms are classified. 25. Taxonomic hierarchy: The arrangement of taxonomic taxa. 

The acellular particles consist of circular RNA Only.

The monerans evolved first and live in extreme habitats.

The monerans evolved after the archaebacteria. 

An organism that contain eukaryotic cells.

In the evolutionary tree, the group of descendants has the same ancestor.

Unicellular organisms that do not have a distinct nucleus in their cells e.g. bacteria. 

The smaller division of the taxon of species. 

The species are at risk of becoming extinct in the near future.