EVERYDAY SCIENCE

Detailed explanation-1: -The body plans cnidarians generally have radial symmetry (Fig. 3.25 A). Because the tentacles of corals, jellyfish, and sea anemones have this radial structure, they can sting and capture food coming from any direction.

Detailed explanation-2: -All cnidarians have two membrane layers, with a jelly-like mesoglea between them. Animals in this phylum display two distinct morphological body plans: polyp or “stalk” and medusa or “bell” (Figure 2). An example of the polyp form is Hydra spp.; perhaps the most well-known medusoid animals are the jellies (jellyfish).

Detailed explanation-3: -Anthozoa, which includes true corals, anemones, and sea pens; Cubozoa, the amazing box jellies with complex eyes and potent toxins; Hydrozoa, the most diverse group with siphonophores, hydroids, fire corals, and many medusae; and. Scyphozoa, the true jellyfish.

Detailed explanation-4: -Mostly marine entities while few such as hydra are found in freshwater. While some are solitary (sea anemone) some others are colonial (Corals) Depict a tissue grade of organization and are diploblastic. Members exhibit radial symmetry, however sea anemones exhibit biradial symmetry. More items