In vertebrates, the blastopore becomes the anus and during cleavage, the regulatory signal in the egg is evenly distributed in the cells. An invertebrate phylum sharing these characteristics is the

Arthropoda

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Annelida

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Mollusca

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Echinodermata

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Solution

The correct option is D Echinodermata
Amongst the options given, Echinodermata is the invertebrate phylum in which the blastopore becomes the anus and during cleavage, and the regulatory signal in the egg is evenly distributed in the cells. It also happens to be the phylum with the maximum number of non-terrestrial and non-freshwater representatives.
So, the correct answer is 'Echinodermata'.

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Similar questions

The characters given below are of a protostome. Identify the wrong statements.

1). Cleavage or division of the zygote is spiral and determinate.

2). During development process the mouth in these animals forms first and arises

from the blastopore or from its anterior margin.

3). Coelom or body cavity is formed due to splitting of mesoderm.

4). Mesoderm is derived from cells on anterior lip of blastopore.

5). Nerve cord is ventral in position.

6). Cell fate is determined the moment the cell is born.

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