Cows, pigs, and sheep have identical amino acid sequences for cytochrome c. What does this say about their evolutionary relatedness? What other properties or traits do these species have in common?

It shows the three organisms to have evolved from a common ancestor.

Explanation:

An identical sequence of amino acids for cytochrome c in cows, pigs and sheep show that they most likely evolved from a common ancestor. The common ancestor might have evolved over time and in result, three different species were produced. It also shows that they are more closely related to one another than other organisms.

Other properties or traits that are common in these organisms are:

They all are mammals.

They are all livestock animals.

They all are multicellular organisms.