Assertion: reptile's egg | /r/HasProperty | amniotic
Facets:
Source sentences:
text: In 1866, Haeckel demonstrated that vertebrates could be divided based on their reproductive strategies, and that reptiles, birds, and mammals were united by the amniotic egg.
text: Most reptiles lay amniotic eggs covered with leathery or calcareous shells.
text: Reptiles have amniotic eggs with hard or leathery shells, requiring internal fertilization.
text: Most reptiles lay amniotic eggs covered with leathery or calcareous shells.