Which two of these statements are true about mammals? - _The females have mammary glands.

_The females give birth to live young.

_They breathe using gills.

_Their endoskeleton is made up of chitin.

1. The females have mammary glands.

2. The females give birth to live young.

... There are, however, several exceptions to the second fact. The platypus and the echidna, which are mammals, do not give birth to live young. They lay eggs instead.