LIFE SCIENCE

Detailed explanation-1: -After kingdoms, the subsequent categories of increasing specificity are: phylum, class, order, family, genus, and species. Figure: Levels in taxonomic classification: At each sublevel in the taxonomic classification system, organisms become more similar.

Detailed explanation-2: -Phylum. Phylum (plural: phyla) is the next rank after kingdom; it is more specific than kingdom, but less specific than class. There are 35 phyla in the kingdom Animalia, including Chordata (all organisms with a dorsal nerve cord), Porifera (sponges), and Arthropoda (arthropods).

Detailed explanation-3: -Linnaeus’ hierarchical system of classification includes seven levels. They are, from largest to smallest, kingdom, phylum, class, order, family, genus, and species.

Detailed explanation-4: -Phylum is positioned after Kingdom and before Class. Species is one of the seven taxonomic ranks used to classify living organisms.

Detailed explanation-5: -Levels of Classification. The classification system commonly used today is based on the Linnean system and has eight levels of taxa; from the most general to the most specific, these are domain, kingdom, phylum (plural, phyla), class, order, family, genus (plural, genera), and species.