Question

Establish common evolutionary origin between fish ,frog, snakes, man, and birds . Birds have evolved from reptiles state with evidence.
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Answer 1

Answer:

in reptiles the heart is three chambered this is the evolutionary kaman origin thank you

Answer 2

There is a common evolution of heart in between fish ,frog, snakes, man, and birds

because 1- chember(fish),2-chember(frog),3- chember(snake) ,4- chember (human) heart obtained by evolution.

•Archaeopteryx is a missing link between reptiles and birds and it has the characters of both of birds and reptiles. These characters prove that Birds have evolved from reptiles

the characters are :-

Reptile's characters:

1. Long tail

2. Cranium similar to reptilian skull

3.Pelvis resembling that of reptiles

4. Two claws on the limbs.

Bird's characters:

1. Reduced fingers

2. Presence of feathers

3. wings resembling birds

4. Flexible first toe