Question

what do we mean bilaterally symmetrical triploblastic?

Answer 1

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⇒  bilaterally symmetrical :

1)  Bilateral Symmetry: It is a type of symmetry in which appendages and organs of the body are paired with one of each pair being present in right and left halves of the body

2)  e.g., lizard, human.

⇒ Triploblastic: 

1) They are animals having three germinal layers—outer ectoderm, middle mesoderm and inner endoderm,

2) e.g., nematodes, arthropods, star fish.

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Answer 2

Bilateral symmetry refers to the property of being divisible into symmetrical halves on either side of a unique plane.
Examples: All the invertebrate phyla starting from Platyhelminthes to Mollusca and all the vertebrate phyla starting from Pisces to Mammalia.
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