Matter can undergo both chemical and physical changes. What indicates that the change was definitely
chemical?

The temperature changed.

A precipitate formed

The color changed.

A gas formed.

i think the answer is gold im not entirely sure

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands