182
Question
Biradial cleavage is found in
Biradial cleavage is found in
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Solution
The correct option is A Ctenophora
When the first three division planes do not stand at right angles to each other, the cleavage is termed as biradial cleavage. Ctenophora symmetry is biradial ( radial + bilateral). Egg contains yolk, hence called lecithal yolk is initially accumulated at centre but later when cleavage starts yolks shift to one side. Cleavage is complete biradial and determinate.
When the first three division planes do not stand at right angles to each other, the cleavage is termed as biradial cleavage. Ctenophora symmetry is biradial ( radial + bilateral). Egg contains yolk, hence called lecithal yolk is initially accumulated at centre but later when cleavage starts yolks shift to one side. Cleavage is complete biradial and determinate.
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