Crocodile and penguin are similar to whale and dog fish in which one of the following features?

Possess a sold single stranded central nervous system

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Lay eggs and guard them till they hatch

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Possess bony skeleton

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Have gill slits at some stage

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Solution

The correct option is D Have gill slits at some stage
Crocodile, penguin, whale and dog fish are all chordates and having pharyngeal gill slits at some stage of life history. This is the characteristics feature of chordates.

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Crocodile and penguin are similar to whale and dog fish in which one of the following features?

The correct option is D Have gill slits at some stageCrocodile, penguin, whale and dog fish are all chordates and having pharyngeal gill slits at some stage of life history. This is the characteristics feature of chordates.

The correct option is D Have gill slits at some stage
Crocodile, penguin, whale and dog fish are all chordates and having pharyngeal gill slits at some stage of life history. This is the characteristics feature of chordates.