Question

Choose the correct combination

• A. annelida and porifera?phyla
• B. oligochaeta and arthropoda? phyla
• C. mollusca and hydrozoa?classes
• D. aves and chordata?classes

Answer 1

The Correct Option is A

Phylum is the topmost taxonomic category restricted to the animal kingdom. It includes one or more classes and is included within a kingdom in the taxonomic hierarchy.

A phylum called annelida is named after the Latin word annellus, which means "little ring." Annelids are frequently referred to as "segmented worms" because they develop a protostome when in their embryonic stages. They may be found in a range of habitats, such as freshwater, terrestrial, and marine settings. Annelids include creatures like earthworms, leeches, and polychaete worms.

The brain and digestive systems of annelids are highly developed, and their reproductive strategies exhibit sexual dimorphism. Invertebrate animals having bilateral symmetry called annelids. They are coelomate and triploblastic. Annelids are most easily recognised by their segmented bodies.

The following Phylum Annelida examples are provided:

A categorization of aquatic organisms is the Porifera phylum. In the Kingdom Animalia, they are the lowest multicellular creatures. Sponge-like organisms belong to the phylum Porifera, which goes by the name of sponges. They cannot move since they are fixed to the substratum. Poriferans are capable of absorbing and retaining liquids. Porifera are the earliest multicellular organisms that possess pores. In this phylum, 5000 species in diverse sizes, shapes, and colours have been found so far.

In the Phylum Porifera, every species possesses distinctive qualities. They are able to reproduce both sexually and asexually. They participate in both the budding and fragmentation processes since they are asexual once more. Eggs and sperm combine during sexual reproduction. 

Due to their green colour and symbiotic association with algae, they were once thought to as plants. They were eventually classified as members of the animal kingdom once their life cycle and feeding strategy were found.