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Which one of the following phyla is correctly matched with its two general characteristics?

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Annelida - Notochord at some stage and separate anal and urinary openings to the outside

Echinodermata - Pentamerous radial symmetry and mostly internal fertilization

Mollusca - Normally oviparous and development through only a trochophore larva

Arthropoda - Body is divided into head, thorax and abdomen and respiration by tracheae

answer is A.

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Detailed Solution

In annelida notochord is absent; Echinodermata –Occurs external fertilisation; Molluscs-develop through Trochophore and Veliger larvae.

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