Which animals have a beak with jaws but no teeth

Which of the following animals have broad and sharp cutting teeth in front and flat, grinding teeth at the back?

Birds have beaks for

Which animal 's teeth acts as filters to get food from water?

Teeth are absent in the jaws of

Teeth are absent in the jaws of

Teeth are absent in the jaws of

Mammals have teeth of this type

Mammals have teeth of this type