First slide

Classification of Animals

Question

Mark the incorrect match.

Moderate

A

Hemichordata - Respiration is by gills
B

Mollusca - Usually dioecious and oviparous
C

Echinodermata - Fertilisation is usually external
D

Platyhelminthes - Paired ganglia and a double ventral nerve cord.

Solution

Neural system of annelids consists of paired ganglia connected by lateral nerves to a double ventral nerve cord.
Platyhelminthes have a primitive ladder-like nervous system.

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