Suchergebnisse
Suchergebnisse:
Vor 3 Tagen · Within a few million years, two important amniote lineages became distinct: synapsids, from which mammals are descended, and sauropsids, from which lizards, snakes, turtles/tortoises, crocodilians, dinosaurs, and birds are descended.
Vor einem Tag · A mammal (from Latin mamma 'breast') [1] is a vertebrate animal of the class Mammalia ( / məˈmeɪli.ə / ). Mammals are characterized by the presence of milk -producing mammary glands for feeding their young, a neocortex region of the brain, fur or hair, and three middle ear bones.
Vor 2 Tagen · Like all other squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to swallow prey much larger than their heads ( cranial kinesis ).
Vor 5 Tagen · As amniotes, reptile eggs are surrounded by membranes for protection and transport, which adapt them to reproduction on dry land. Many of the viviparous species feed their fetuses through various forms of placenta analogous to those of mammals, with some providing initial care for their hatchlings.
Vor 5 Tagen · Together with turtles, the tuatara has the most primitive hearing organs among the amniotes. There is no tympanum and no earhole, and the middle ear cavity is filled with loose tissue, mostly adipose (fatty) tissue.
Abstract. Mehrlinge stellen eine besondere Herausforderung an werdende Eltern, Hebammen und Ärzt:innen dar, da die Mehrlingsschwangerschaft zu den Risikoschwangerschaften zählt. Unterschieden werden Mehrlinge anhand ihrer Zygotie ( monozygot. oder. dizygot.
Vor 5 Tagen · The Permian witnessed the diversification of the two groups of amniotes, the synapsids and the sauropsids . The world at the time was dominated by the supercontinent Pangaea , which had formed due to the collision of Euramerica and Gondwana during the Carboniferous.
