Which one has no intermediate host?
- Taenia
- Ascaris
- fasciola
- Plasmodium
The Correct Option is B
Approach Solution - 1
Ascaris lumbricoides (the common roundworm) has no intermediate host. Man acquires infection by directly ingesting Ascaris eggs having the infective second stage- rhabditoid larva, with contaminated food or water.
So, the correct answer is (B): Ascaris
Approach Solution -2
An intermediate host is the one that will serve as a temporary host for the parasite where it will undergo developmental stages. They help in the survival of the parasite.
The intermediate host for tapeworm is beef or pork.
The intermediate host for liver fluke is snail.
The intermediate host for plasmodium is the female anopheles mosquito.
But there is no intermediate host for ascaris, it has a single host that is human.
Therefore, the answer is (B): Ascaris.
Top Questions on Classification Of Animals
- Which of the following pairs is an incorrect match?
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A. Annelids are true coelomates
B. Poriferans are pseudocoelomates
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D. Platyhelminthes are pseudocoelomates
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- Match List I with List II :Choose the correct answer from the options given below :
List - I List – II A. Chondrichthyes i. Clarias B. Cyclostomata ii. Carcharodon C. Osteichthyes iii. Myxine D. Amphibia iv. Ichthyophis - NEET (UG) - 2024
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- Observe the following simplified scheme and choose the correct option that matches with the letters given in the boxes.
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- Reduced coelom is found in:
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Questions Asked in JIPMER exam
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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