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Animal Kingdom — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYAnimal Kingdom2 Marks
Question
Which one of the following statements is incorrect?
  1. Mesoglea is present in between ectoderm and endoderm in Obelia.
  2. Exhibits radial symmetry Asterias.
  3. Fasciola is a pseudocoelomate animal.
  4. Taenia is a triploblastic animal.
✓

Answer

  1. Fasciola is a pseudocoelomate animal.

Explanation:

The statement, Fasciola is a pseudocoelomate animals, is incorrect as it does not possess body cavity hence, it is an acoelomate. Mesoglea is an undifferentiated layer and is a characteristic of diploblastic and triploblastic animals present along with ectoderm and endoderm. Symmetry in which the body can be divided into two equal identical halves from any plane passing through the central axis. as shown by Asterias, is called radial symmetry Taenia is a triploblastic animal, it possesses three germinal layers, i.e., ectoderm, endoderm and mesoderm. 

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