Animal KingdomHard
Question
Which one of the following statements is not corect?
Options
A.All echinoderms are viviparous.
B.Roundworm has no circulatory system.
C.In bony fishes, swim bladder is usually present.
D.In cartilaginous fishes, fertilization is internal.
Solution
the animals of phylum echinodermata are oviparous. They have the abilty of regeneration.
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