Reptilia differ from Amphibians in which of the following aspects?

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.

Which of the following options represents the correct ascending order of complexity in animal body organization?

In which of the following kingdoms do organisms primarily reproduce through sexual methods?

Which one of the following is not correctly matched?

Which one of the following groups of three animals is correctly matched with their morphological characteristic?