AIIMS 2018 Biology Phylum Coelenterata MCQ Question

Coelenterata, also known as Cnidaria, are characterized by the presence of cnidoblasts (stinging cells) and exhibit radial symmetry, allowing them to interact with their environment from multiple directions. Option A is incorrect because Coelenterates do not display bilateral symmetry; instead, they have a body plan that is organized around a central axis. Option C refers to Porifera, which possess choanocytes and a water canal system, while option D inaccurately suggests that all Coelenterates are marine and reproduce only sexually, as many also reproduce asexually.