write a comparative account on arthropoda and Mollusca
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Arthropoda
The body plan of arthropods are as distinct with segmentation - head, Thorax and abdomen. The exoskeleton is made up of chitin. Excretion occurs through malpighian tubes and green glands .
Mollusca
The body is divided into head muscular foot and visceral mass. The body is covered by a Mantle enclosed by an outer shell. Respiration is carried out through gills or lungs or both. The most common larva is trochophore and veliger larva
The body plan of arthropods are as distinct with segmentation - head, Thorax and abdomen. The exoskeleton is made up of chitin. Excretion occurs through malpighian tubes and green glands .
Mollusca
The body is divided into head muscular foot and visceral mass. The body is covered by a Mantle enclosed by an outer shell. Respiration is carried out through gills or lungs or both. The most common larva is trochophore and veliger larva
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