SSC MTS EXAM

Detailed explanation-1: -Earthworms and leeches both belong to a group of invertebrates called annelids. These are soft worms whose bodies are split into parts, called segments. Each segment has its own set of organs.

Detailed explanation-2: -An earthworm is a terrestrial invertebrate that belongs to the phylum Annelida. They exhibit a tube-within-a-tube body plan; they are externally segmented with corresponding internal segmentation; and they usually have setae on all segments. They occur worldwide where soil, water, and temperature allow.

Detailed explanation-3: -Approximately 16, 500 species have been described in phylum Annelida. The phylum includes earthworms, polychaete worms, and leeches. Annelids show protostomic development in embryonic stages and are often called “segmented worms” due to their key characteristic of metamerism, or true segmentation.