EVERYDAY SCIENCE

Detailed explanation-1: -Annelids and arthropods are bilaterally symmetrical, that is, the body can be divided into two identical halves only along one imaginary plane.

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. Metamerism allows animals to become bigger by adding “compartments, ” while making their movement more efficient.

Detailed explanation-3: -The Annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms.

Detailed explanation-4: -Bilateral symmetry involves the division of the animal through a sagittal plane, resulting in two mirror-image, right and left halves, such as those of a butterfly, crab, or human body. Animals with bilateral symmetry have a “head” and “tail” (anterior vs. posterior), front and back (dorsal vs.

Detailed explanation-5: -No, annelids have bilateral symmetry, meaning they are only symmetrical along the sagittal plane (as humans and all mammals are).