Question

All triploblastic animals are?
A)Eucoelomated
B)Bilateral symmetry
C)Schizocoelomates
D)Pseudocoelomates

Answer 1

Triploblastic organisms are those which consist of three germinal layers in their body organization which includes ectoderm, endoderm and mesoderm.

Complete answer:
Let us analyze the options to find out the correct option.

Option A: Eucoelomates are animals who have true coelom. They are also called coelomates. Their body cavity is completely lined with a peritoneum that attaches to organs. All triploblastic organisms have coelomates and are eucoelomate in nature. Therefore, this is the correct option.

Option B: Bilateral symmetry is a form of symmetry in which opposite sides are not similar. Triploblastic animals do not always show bilateral symmetry as they also have radial symmetry. Therefore, this is the incorrect option.

Option C: Schizocoelomates are those animals that contain a schizocoelom which is a body cavity that lies between the digestive tract and musculature of the body. All triploblastic animals are not schizocoelomates. Therefore, this is the incorrect option.

Option D: Pseudocoelomates like aschelminthes are those which do not have a true coelom or body cavity. Triploblastic organisms have true coelom and do not have pseudocoelom. Therefore, this is the incorrect option.

Hence, the correct answer is option (A)

Note: Echinoderm and molluscs are examples of triploblastic animals which have three germinal layers ectoderm, endoderm and mesoderm. They all are coelomates and have a true body cavity present in them.