Answer the following questions. 1. What type of symmetry is characteristic of Cn

Question

Answer the following questions. 1. What type of symmetry is characteristic of Cnidarians? [1 point] 2. Give the name of one eukaryotic model organism and a specific biological problem that can be examined by the study of that organism. [2 points] 3. Explain the difference between molting and metamorphosis. 12 points] 4. Which type of symmetry does a triploblastic animal have? [1 point] 5. Which type of worm does not have an alimentary canal? [1 point] 6. Mention two phyla composed of pseudocoelomates 12 points] 7. The blastopore is generated during which developmental stage? [I point]

Explanation / Answer

1. Cnidarians belong to the animal phylum and represents one of the primitive organisms. This group includes jellyfish, sea anemones, corals and hydras.

Cnidarians are well characterized by the radial symmetry of their body plan. Animals are said to represent radial symmetry when all the parts of an animal arise from a common central axis and if they are divided through the line of axis, they will give rise to two equal parts.

Answer: Cnidarians exhibit radial symmetry.

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