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Did Placental mammals evolve from Marsupials OR from Reptiles?
Wiki User
∙ 12y ago
Marsupials, because Reptiles have never been mammals and have always had their offspring in eggs outside of them.
Wiki User
∙ 12y ago
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Which type of critter did birds and mammals evolve from?
Birds and mammals both evolved from reptiles.
What reptiles did mammals evolve from?
A proto-mammal called the synapsid.
How do vertebrates evolve?
fish- amphibians- reptiles- birds -mammals
Did mammals evolve from dinosaurs?
No. Mammals evolved from synapsid reptiles, a group not closely related to dinosaurs. Dinosaurs are more closely related to modern reptiles and birds than they are to mammals.
What did the lizard evolve into?
It is believed that snakes evolved from lizards. Lizards are an existing group of reptiles, of course, so did not 'evolve into' anything else--they are still here. While mammals and birds evolved from reptiles, they did not evolve from lizards.
Why are monotremes found in austrillia?
Monotremes were among the earliest mammals to evolve. However, in most of the world, all monotremes went extinct as a result of competition with more advanced placental mammals. Australia and New Guinea, however, have been so isolated that there were nearly no placental mammals (except for bats) until humans introduced them. The lack of competition from placental mammals allowed monotremes to survive in Australia.
Did mammals evolve from a group of reptiles called raptors?
No. Mammals evolved from a group of reptiles called cynodonts. "Raptor" is an informal term for a group of dinosaurs call dromaeosaurids, which were closely related to the ancestors of birds.
In what order did the five classes of vertebrates evolve?
1.Fish 2.Amphibians 3.Reptiles 4.Birds 5.Mammals
Do snakes evolve from reptiles?
They ARE reptiles.
Did fish evolve from early reptiles?
no, the reptiles evolved from fish
Do marsupials live only in Australia?
No. Opossums, shrew opossums, and the Monito Del Monte (total 102 species) live in the Americas. Also, if you only meant to include the island of Australia in your question, then New Guinea, many islands between Sulawesi and New Guinea, Tasmania, and New Zealand also have marsupial species.
Did amphibians evolve from early reptiles?
no
