Question

Which of the following belongs to phylum Aschelminthes ?

a. Animals in phylum Annelida-Nereis

b. Animals in phylum Ascheminthes-female Ascaris

c. Animals in Cnidaria phylum-Sea anemone

d. Animals in phylum Platyhelminthes-Liverfluke​

Answer 1

b. Animals in phylum Ascheminthes-female Ascaris belongs to phylum Aschelminthes

Phylum Aschelminthes:

• Roundworms are the popular name for Aschelminthes.
• They are distinguished by having a pseudocoelom.
• It is now an extinct phylum of invertebrates, and the creatures it once included are now organized into 10 other phyla.
• The obsolete phylum of pseudocoelomate and other similar animals that are no longer thought to be closely related and have been promoted to phyla in their own right is known as the Aschelminthes (also known as Aeschelminthes, Nemathelminthes, or Nematodes). It is closely related to the Platyhelminthes.
• The body is triploblastic and bilaterally symmetric.
• The body is long, slender, and not segmented; it tapers out at the end.
• There is no evidence of metameric segmentation.
• Males are often smaller than females since they are dioecious.

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