Which one of the following pairs of animals are jaw-less fishes?

Lampreys and hag fishes

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Guppies and hag fishes

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Lampreys and eels

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Mackerels and rohu

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Solution

The correct option is A Lampreys and hag fishes
The class Agnatha consists of a group of animals, that lack jaws and paired fins. There are two living groups of Agnatha, the lampreys, and the hagfish.
So, the correct answer is option A.

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From the following data, mark the option(s) where $Δ$ H is correctly written for the given reaction.

Given : $H^{+} (a q) + O H^{-} (a q) \to H_{2} O (ℓ); Δ H = - 57.3 k J$

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Which one of the following pairs of animals are jaw-less fishes?

The correct option is A Lampreys and hag fishesThe class Agnatha consists of a group of animals, that lack jaws and paired fins. There are two living groups of Agnatha, the lampreys, and the hagfish. So, the correct answer is option A.

The correct option is A Lampreys and hag fishes
The class Agnatha consists of a group of animals, that lack jaws and paired fins. There are two living groups of Agnatha, the lampreys, and the hagfish.
So, the correct answer is option A.