Multiple choice

Which of the following is a characteristic of cartilagious fishes?

  1. They contain four pairs of gill slits.

  2. Their mouth is ventral in position.

  3. Their caudal fin is homocercal.

  4. Air bladder is usually present in them.

  5. They have a bony endoskeleton.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option.

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