Fill in the Blanks VertebratesOnline version Complete these sentences about vertebrates. by Begoña Ruiz 1 water feathers eggs hair milk four scales eggs eggs wet wings live Mammals have . Baby mammals are born . They drink their mother's . Birds are oviparous , they are born from . Birds have . They have to fly . Reptiles are vertebrates . They lay and they have . Some have legs , some don't have legs and some have a shell . Amphibians have a skin . They live in the and on land . Amphibians lay in the water .