All worms are

Which one of the following animals is correctly matched with its one characteristic and the taxon?

Which of the following pairs is mismatched?

Which of the following characteristics are $NOT$ common to both Aves (birds) and Mammalia (mammals)?
$I$ - Homeothermic (warm-blooded) animals.
$II$ - Respire through lungs.
$III$ - Possess a four-chambered heart.
$IV$ - Dioecious (sexes are separate).
$V$ - Possess hair on the skin.
$VI$ - Show internal fertilization.
$VII$ - Possess teeth.

$Peripatus$ is a connecting link between

These animals are oviparous or ovoviviparous and exhibit internal fertilization.