Fill in the blanks with appropriate examples. I. . .. A ... are also called as nematocytes. II .... B ... is seen in Physalia. III. Meandrina is also known as ... C .... IV .... D ... is found in Aurelia. Here A to D refers to
A
A-Cnidoblasts, B-Cellular level of organisation, C-Sea fan, D-Bilateral symmetry
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C
A-Stinging, B-Cellular level of organisation, C-Sea-cucumber, D-Bilateral symmetry
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D
A-Cnidocytes, B-tissue-level of organisation, C-Brain coral, D-Radial symmetry
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Solution
The correct option is D A-Cnidocytes, B-tissue-level of organisation, C-Brain coral, D-Radial symmetry Cnidocytes/cnidoblast cells are also called as nematocytes. Tissue level of organisation is seen in Physalia. Meandrina is also known as brain coral. Radial symmetry is found in Aurelia.