Question Detail
Question
Which of the following animal Phylum do not have segmentation?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Segmentation, or metamerism, is a repetition of similar body parts along the length of an animal. Annelida (e.g., earthworms), Arthropoda (e.g., insects, crustaceans), and Chordata (e.g., vertebrates) exhibit segmentation. Phylum Cnidaria (e.g., jellyfish, sea anemones) are radially symmetrical and do not have segmented bodies.
Hint
Consider the simplest animal body plans among the given options.