Articles > Mammalian Ancestors – Quiz Mammalian Ancestors – Quiz Quiz Choose the best answer. 1. Mammals give birth to a live young except for ... Marsupials Monotremes Both marsupials and monotremes None. All mammal groups give birth to live young. 2. These are the common features of mammals except for: Warm-blooded Mammary glands Vertebrates Metamorphosis 3. Direct ancestors of mammals Vertebrates Insects Invertebrates Worms 4. Mammal-like reptiles are referred to as Paramammals Placentals Marsupials Reptilians 5. Reptiles are presumed to be the direct ancestors of Birds Mammals Both birds and mammals None of the above Send Your Results (Optional) Your Name To Email Time is Up!