https://www.ruf.rice.edu/~bioslabs/studies/invertebrates/kingdoms.html

Once upon a time, all living things were lumped together into two kingdoms, ... Accepted systems of classification have changed at a far faster pace than the ...

https://en.wikipedia.org/wiki/Kingdom_(biology)

In biology, kingdom (Latin: regnum, plural regna) is the second highest taxonomic rank, just .... The classification of living things into animals and plants is an ancient one. Aristotle (384–322 BC) classified animal species in his History of Animals ...

https://www.thoughtco.com/six-kingdoms-of-life-373414

Living organisms are classified into one of six kingdoms of life, categorized based on common characteristics.

https://www.britannica.com/science/taxonomy/A-classification-of-living-organisms

Taxonomy - A classification of living organisms: Recent advances in biochemical ... and have fortified support for a five-kingdom classification of living organisms.

https://www2.palomar.edu/users/warmstrong/trfeb98.htm

The five-kingdom system of classification for living organisms, including the prokaryotic Monera and the eukaryotic Protista, Fungi, Plantae and Animalia is ...

https://www.siyavula.com/read/science/grade-10-lifesciences/biodiversity-and-classification/09-biodiversity-and-classification-04

The five kingdom system is the most common way of grouping living things based on simple distinctive characteristics. Classification systems are always ...

https://www.cliffsnotes.com/study-guides/biology/biology/the-unity-and-diversity-of-life/kingdoms-of-living-things

In his classification scheme, Linnaeus recognized only two kingdoms of living things: Animalia and Plantae. At the time, microscopic organisms had not been ...

https://www.youtube.com/watch?v=oID1h-zL-uw

Dec 19, 2016 ... The classification system organises species into domain, kingdom, phylum, class, order, family, genus and finally species. 'Kingdom' is the ...

https://en.wikibooks.org/wiki/General_Biology/Classification_of_Living_Things/Classification_and_Domains_of_Life

Under the three domains are six kingdoms in taxonomy. ... in 1866 to classify micro-organisms which are neither animals nor ...

http://www.softschools.com/science/biology/classification_of_living_things/

These specialized groups are collectively called the classification of living things. The classification of living things includes 7 levels: kingdom, phylum, classes, ...