In all mammals, . . . . . . .

Choose the correct option for the following statements:
$(i)$ Animals that maintain a constant body temperature are called $cold-blooded$ / $warm-blooded$ animals.
$(ii)$ Mammals are $viviparous$ / $oviparous$ animals.

Ruminants belong to which order?

Which of the following characteristics is associated with the life of mammals?

Mammals that possess a marsupium (pouch) are called .....

External ear pinna are present in $:-$