Question

Which of the following statements aptly describes the phylum Annelida?

• A. A group of animals in which the space between the ectoderm and endoderm is simply filled with mesenchymal mesodermal cells.
• B. A group of animals with long, flat body without true segmentation, that lives in water or moist soil or are parasitic invertebrates.
• C. A group of animals that have an elongated, cylindrical and unsegmented body.
• D. A group of animals that have an elongated body that is composed of partitions called metameres or annulations.

Answer 1

The correct option is D A group of animals that have an elongated body that is composed of partitions called metameres or annulations.

The phylum Annelida includes earthworms, leeches, and marine worms known as polychaetes. The species in this phylum have a tube like elongated and metameric bodies. Metameric bodies are divided into segments called annuli. The annuli are covered in tiny hairs called as setae which help in locomotion.

Thus, the correct answer is option D.