Question:

Phylum of Taenia solium is :

Updated On: Sep 3, 2024

Aschelminthes
Annelida
Platyhelminthes
Mollusca

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The Correct Option is C

Solution and Explanation

Taenia solium (tapeworm) belongs to phylum Platyhelminthes and class Cestoda. The characteristic features of Platyhelminthes are the presence of triploblastic, bilaterally symmetrical, acoelomate body, flattened shape, lack of anus and flame cells as excretory organ. The characteristic features of phylum Aschelminthes are pseudocoelom, triploblastic, bilateral symmetry, organ system grade of organization and absence of circulatory and respiratory system. The phylum Annelida is characterised by elongated bilaterally symmetrical body with metameric segmentation, closed blood vascular system and nephridia. Mollusca is second largest phylum and the animal is characterised by triploblastic coelomate unsegmented and bilaterally symmetrical body with bearing mantle.

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Concepts Used:

Classification of Animals

Classification of Animal Kingdom:

One of the most fundamental forms of classification of animals is the presence or absence of the notochord. Hence, two major groups exist, namely: Chordates and Non-chordates

Non-chordates and the Chordates-

The notochord is a flexible rod made out of a material similar to cartilage. If an animal has a notochord during any stage of its life, it is classified as a chordate. Contrary to popular belief, chordates do not exclusively include vertebrates.
There are invertebrates that possess a notochord during some point in their lives and hence, are classified as chordates. Thus all vertebrates are chordates but not all chordates are vertebrates.

Non-chordates-

Non-chordates are animals without a notochord – the rod-like elastic structure that supports the body. This phylum consists of a small group of worm-like, marine species with an organ-system level of organization.
Members of phylum Porifera, Coelenterata, Ctenophora, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata and Hemichordata fall under Non-chordates

Vertebrates Classification:

The subphylum Vertebrata is divided into five classes of vertebrates. These five classes of vertebrates comprise of all the species of animals and have developed vertebral column as well as an internal skeleton.

Other characteristic features of vertebrates are-

Presence of a true vertebral column and internal skeleton with muscle attachment points for body movement.
A front-side muscular heart with two, three or four chambers.
Kidneys for excretion and osmoregulation
A paired appendages which may be fins or limbs.
Possess notochord during the embryonic stage.
Vertebrates are the only chordates to possess a brain as a part of the central nervous system.

Classification of Vertebrates-

Pisces
Amphibia
Reptilia
Aves
Mammalia

List - I		List – II
A.	Chondrichthyes	i.	Clarias
B.	Cyclostomata	ii.	Carcharodon
C.	Osteichthyes	iii.	Myxine
D.	Amphibia	iv.	Ichthyophis