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Question
Which one of the following pairs of animals comprises 'Jaw less fishes' ?
Which one of the following pairs of animals comprises 'Jaw less fishes' ?
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Solution
The correct option is C Lampreys and hag fishes
In Jaw-less Fishes or the Agnathan Fishes, the mouth is not bounded by jaws. Examples of fishes without jaws are - Lampreys (viz. Petromyzon) and Hag Fishes (viz. Myxine). The Agnathan (Jaw-less) fishes are not as efficient predators as the Gnathostome (Jawed) fishes.
The lampreys are parasitic fishes. Their jaw-less mouth comprises of supportive ring-like cartilage and horny teeth, which help Lampreys to latch on to other fishes. They rasp away flesh and suck out blood out of the host fishes.
The Hag Fishes feed upon marine worms and other aquatic invertebrate animals. They are primarily scavengers. Hag fishes burrow into dead and decaying fishes and consume their flesh.So, the correct answer is 'Lampreys and hag fishes'
In Jaw-less Fishes or the Agnathan Fishes, the mouth is not bounded by jaws. Examples of fishes without jaws are - Lampreys (viz. Petromyzon) and Hag Fishes (viz. Myxine). The Agnathan (Jaw-less) fishes are not as efficient predators as the Gnathostome (Jawed) fishes.
The lampreys are parasitic fishes. Their jaw-less mouth comprises of supportive ring-like cartilage and horny teeth, which help Lampreys to latch on to other fishes. They rasp away flesh and suck out blood out of the host fishes.
The Hag Fishes feed upon marine worms and other aquatic invertebrate animals. They are primarily scavengers. Hag fishes burrow into dead and decaying fishes and consume their flesh.
So, the correct answer is 'Lampreys and hag fishes'
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