Between ectoderm and endoderm an undifferentiated layer mesoglea is not present in ________.
Both A and B
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The correct option is C Platyhelminthes Mesoglea is the undifferentiated layer which is present between the ectoderm and endoderm. Coelenterata and Ctenophora show the scattered pouches in between ectoderm and endoderm. These groups have true body cavity. They are Pseudocoelomates. However, this layer is not present in Platyhelminthes. In these animals, the body cavity is absent. They are also called as acoelomates.
Thus, the correct answer is 'Platyhelminthes.'
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Animals in which the body cavity is not lined by mesoderm, and instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm are:
Which of the following statements is incorrect?
(a) Mesoglea is present in between ectoderm andendoderm in Obelia
(b) Asterias exhibits radial symmetry an
(c) Fasciola is pseudocoelomate animal
(d) Taenia is a triploblastic animal
Differentiated embryonic layers are called I. ectoderm II. endoderm III. mesoderm lV. mesoglea
Molluscs have only two germ layers- the ectoderm and the endoderm.
In which of the following animals, mesoderm is present as scattered pouches in between the ectoderm and endoderm?