Question

Choose the phylum that has subcategories:
A) Arthropoda
B) Mollusca
C) Platyhelminthes
D) Chordata

Answer 1

Hint: A phylum is a level of classification or taxonomic rank in biology that is below kingdom and above class. Although the International Code of Nomenclature for algae, fungi, and plants accepts the terms as equivalent, the division has traditionally been used in botany instead of the phylum.

Complete answer:
Even though the International Code of Nomenclature for algae, fungi, and plants recognizes the terms as equivalent. According to various definitions, the animal kingdom Animalia or Metazoa contains approximately 31 phyla; the plant kingdom Plantae contains approximately 14, and the fungus kingdom Fungi contains approximately 8 phyla.

Phylum is an abbreviation for Phylum Arthropoda are animals that have colonized terrestrial, aquatic, and aerial habitats successfully. It is the animal kingdom's largest phylum, and it includes familiar forms such as lobsters, crabs, spiders, mites, insects, centipedes, and millipedes. The majority of arthropods are small animals. Only aquatic forms can grow to be large, and Arthropods are the only invertebrates capable of flight.

The presence of a segmented body and the fusion of sets of segments that give rise to functional body regions called tagma distinguishes animals in the arthropod phylum. Tagma can be ahead, thorax, and abdomen, or a cephalothorax and abdomen, or ahead and trunk.
Classification of phylum Arthropoda

The phylum Arthropoda is commonly divided into four subphyla:
- Chelicerata
- Crustacea
- Hexapoda
- Myriapoda
- Onychophora
- Trilobitomorpha

Thus, the phylum that has subcategories is Arthropoda. So, option (A) is correct.

Note: Only nine animal phyla (Mollusca, Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Arthropoda, Echinodermata, and Chordata) contain the vast majority of described, extant species.