Answer:
Vestigial structures
Explanation:
support evolution, by suggesting us that the organism changed from using structure to not using structure or using it for another purpose.
I believe the correct answer is "Carbon dioxide"
The answer is mitochondria
All arteries leaving the heart, arteries carrying blood to the body, (I'm not sure about pulmonary arteries, but since it is an artery I am assuming it has oxygenated blood", and the aorta
Are sponges jointed not jointed or nothing
Sponge are are nothing
