First slide

Classification of Animals

Question

Choose the correct statement.

Moderate

A

All sponges are marine.
B

All flatworms are endoparasites.
C

All arthropods are dieocious.
D

All protochordates are marine.

Solution

Subphyla Urochordata and Cephalochordata are often referred to as protochordates and are exclusively marine.
Spongilla is a fresh water sponge.
Planaria is a free-living flatworm.
Most arthropods are dioecious, but many are hermaphroditic, and some reproduce parthenogenetically.

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