Digestive system is absent in

Arthropoda

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Nematoda

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Platyhelminthes

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Porifera

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Solution

The correct option is C Porifera
A. Phylum Arthropoda has a digestive tract complete from mouth to anus.
B. Phylum Nematoda has a straight digestive tract and complete with anus.
C. Phylum Platyhelminthes has an incomplete digestive tract.
D. Phylum Porifera doesn't have digestive system. The members of phylum Porifera i.e Sponges, directly ingest the food with the help of choanocytes or collar cells.
So, the correct answer is'Porifera'.

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Similar questions

Phylum	Level of organization	Symmetry	Coelom	Segmentation	Circulatory system	Digestive system	Respiratory system
???	Organ system	Bilateral	Coelomate	Present	Present	Complete	Absent

Read the following statements about the 'digestive system' and identify the incorrect one(s) :

I.The human digestive system includes the alimentary canal and digestive glands.

II.Amoeba has a simple digestive system.

III.As the functions in an organism increase, the complexity of the digestive system decreases.

IV. The digestive system is the same in all organisms

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