Birds and humans are theorized to have a common ancestor because they have homologous structures. Which evidence best supports this theory?

h let me think

if you mean hydrogen and oxygen then water is the product

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.