Bilaterally symmetrical animals are those in which:
Aany plane through the centre divides the body into equal halves
Bonly one plane passing longitudinally through the centre divides the body into equal halves
Cno plane can divide the body into equal halves
Dtransverse planes alone divide the body into equal halves
Answer & Solution
Correct answer: B. only one plane passing longitudinally through the centre divides the body into equal halves
Bilateral symmetry means the body can be split into two equal mirror-image halves by only one longitudinal plane. This is typical from Platyhelminthes up to Chordata.
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