First slide

Classification of Animals

Question

Select the option which shows the correct combination of an organism and its feature.

Easy

A

Echinus - Well-developed excretory system
B

Dentalium - Metameric segmentation
C

Bombyx - External fertilisation
D

Balanoglossus - Body is divided into proboscis, collar and trunk

Solution

Balanoglossus is a hemichordate. In hemichordates, body is divided into a proboscis, collar and a long trunk. Echinus is an echinoderm. Special excretory organs are absent in echinoderms. Dentalium is a mollusc. Molluscs are unsegmented. Fertilization is mostly internal in arthropods (e.g., Bombyx), except a few aquatic forms.

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