EVERYDAY SCIENCE

Detailed explanation-1: -Segmented worms (phylum Annelida) are the most complex animals with worm-like body plans. A study of worms can illuminate a possible history of how some organ systems and body features evolved. Worms are invertebrate animals with bilateral symmetry.

Detailed explanation-2: -Annelids display bilateral symmetry and are worm-like in overall morphology. They have a segmented body plan where the internal and external morphological features are repeated in each body segment.

Detailed explanation-3: -Annelida. Annelids are segmented worms, known for having bilateral symmetry and a segmented body. Leeches are also examples of annelids, as are some types of marine worms.

Detailed explanation-4: -Having over 17, 000 species, Phylum Annelida is a large phylum. Annelids are also known as ringworms or segmented worms. They exist in various environments including marine waters, fresh waters and also in moist terrestrial areas.

Detailed explanation-5: -Annelids and arthropods have long been considered each other’s closest relatives, as evidenced by similarities in their segmented body plans.