EVERYDAY SCIENCE

SCIENCE

ZOOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Phylum Platyhelminthes or “Flat Worms” are unusual parasites because:
A
Are incurable
B
Only ever target the liver or intestine
C
Depend on more than one animal to complete their life cycle
D
Can leave the host anytime they desire
Explanation: 

Detailed explanation-1: -Animals belonging to the phylum Platyhelminthes are also called flatworms due to dorsoventrally flattened bodies. They are relatively simple, bilateral, unsegmented and soft-bodied invertebrates.

Detailed explanation-2: -The Platyhelminthes, both parasitic and free-living taxa, share a set of characters: they are nonsegmented acolomates without an anus, which lack respiratory and circulatory systems but possess an excretory system.

Detailed explanation-3: -The unique features of the phylum Platyhelminthes are as follows: They have a dorsoventrally flattened body. They are acoelomate, triploblastic and bilaterally symmetrical. They have an incomplete digestive system, they have only one opening.

Detailed explanation-4: -They are triploblastic, acoelomate, and bilaterally symmetrical. They may be free-living or parasites. The body has a soft covering with or without cilia. Their body is dorsoventrally flattened without any segments and appears like a leaf. More items

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