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Q29 - Diagnostic Traits of Four Animal Phyla

Theoretical 2 Real exam question - full text reproduced under IBO's CC BY-NC-SA 4.0 license
Classification Principles & Nomenclature

You are given four figures referring to typical representatives of four major phyla of animals.

Figure 1. Figure 1.

Using the information and data, determine which of the statements are true or which are false.

A. Organism A belongs to a taxon characterized by unique aquiferous system, radial or no symmetry and lack of tissue and organ systems.
B. Organism B belongs to a taxon characterized by bilateral symmetry, lack of coelom, protonephridia and ladder-like nervous system.
C. Organism C belongs to a taxon characterized by entrocoelic development, pentaradial symmetry and metamorphosis.
D. Organism D belongs to a taxon characterized by radial symmetry, hydrostatic skeleton and schizocoelic development.
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Question reproduced from IBO 2018, Theoretical Paper 2, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)