Which of the following does not pertain to a protostome?

Spiral cleavage

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Blastopore is associated with the anus.

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Schizocoelom

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Annelids, arthropods, and molluscs

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Solution

The correct option is B Blastopore is associated with the anus.
Protosomes have spiral and determinate cleavage. Coelom is schizocoelom and is formed by splitting the mesodermal embryonic tissue. The blastopore develops into the mouth in such animals. Protostomes include the phyla Mollusca, Annelida and Arthropoda.
So, the correct option is 'Blastopore is associated with the anus.'

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