According to the Theory of evolution, the feathers on a sparrow evolved from....
A- Hide.
B- Scales.
C- Joints.
D- Claws.
2007-03-12 06:49:55 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Biology
Feathers most likely originated as a filamentous insulation structure, or possibly as markers for mating, with flight emerging only as a secondary purpose. It has been thought that feathers evolved from the scales of reptiles, but recent research suggests that while there is a definite relationship between these structures, it remains uncertain the exact process. Experiments show that the same protein (when missing before birth) that causes bird feet to stay webbed, causes bird scutes and scales to become feathers.
So the most likely answer is B.
2007-03-12 07:02:18 · answer #1 · answered by Curiosity 7 · 0⤊ 0⤋
Scales.
Birds evolved from lizzards. The scales evolved into feathers.
2007-03-12 13:56:28 · answer #2 · answered by mgerben 5 · 1⤊ 0⤋
just a guess.................scales?
2007-03-12 13:54:58 · answer #3 · answered by Jas 3 · 0⤊ 0⤋