Final answer:
Amino acid sequences between two organisms can reveal their evolutionary relationships and common ancestry. Comparing the sequences of proteins can help determine the degree of similarity or difference between organisms and provide insights into their evolutionary history. Additionally, studying the three-dimensional structures of proteins can provide further information about evolutionary relationships.
Step-by-step explanation:
Amino acid sequences between two organisms can tell us about their evolutionary relationships and common ancestry. By comparing the amino acid sequences of proteins in different species, we can determine the level of similarity or differences between them. This information can help us understand how closely related organisms are and how they have evolved over time.
For example, comparing the amino acid sequences of a protein like cytochrome c in different organisms can reveal the degree of similarity or difference between them. A higher degree of similarity suggests a more recent common ancestor, while a larger difference suggests a more distant common ancestor.
Furthermore, studying the three-dimensional (3D) structures of proteins can provide even more information about evolutionary relationships. Although the amino acid sequences of proteins may differ, their 3D structures can be highly similar, indicating a conserved property across species.