Which of the following phyla exhibit true metameric segmentation?

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.

Trichonympha is a symbiont in the alimentary canal of

Which statement is true for $Spongilla$,$Leech$,$Dolphin$,and $Penguin$?

Find out the incorrect match in the following options.

Which of the following represents a correct match of a somatic feature and the animal possessing it?