2A scientific reasons.
1 mammals have evolved from - repitals.
and amphibians. from fish.
Answers
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he first amniotes apparently arose in the middle Carboniferous from the ancestral reptiliomorphs. Within a few million years, two important amniote lineages became distinct: mammals' synapsid ancestors and the sauropsids, from which lizards, snakes, turtles/tortoises, crocodilians, dinosaurs, and birds are descended.
The first reptiles evolved from an amphibian ancestor at least 300 million years ago. They laid amniotic eggs and had internal fertilization. They were the first vertebrates that no longer had to return to water to reproduce. They could live just about anywhere.
The new mammals evolved a system of reproduction which leaves the young to develop more fully inside the mother. ... One has to go back to a period 250 million years ago when the transition to mammals began in the form of mammal-like reptiles. Mammals evolved from a group of reptiles called the synapsids.
So, what do birds, reptiles, amphibians, and fish All Have In Common? These animals have much in common. These animals all need and use energy, they are all made up of cells, they also all have bones which means that they're vertebrates, and they all use muscles to move around from one place to another
Answer:
Peripatus is a connecting link between annelida and arthropoda.Similarly duck -billed platypus lays eggs like reptiles but shows relationship with mammals due to presence of mammary glands and hairs lung fish performs respiration with lungs irrespective of being a fishTherefore , these examples indicates that mammals are evolved from reptiles and amphibians from fishes.
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