First slide

Classification of Animals

Question

Which of the following represents the correct combination of a group with its character, without any exception?

Moderate

A

Annelida – Monoecious
B

Arthropoda – Indirect development
C

Mollusca – Mantle
D

Echinodermata – External fertilization

Solution

All Molluscans have mantle. Among Annelids, Polychaetes (e.g. Nereis) are dioecious. Among Arthropods, indirect development is absent in Scorpion. Internal fertilisation occurs in few Echinoderms.

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