How do birds and dogs both use DNA as instructions for building there body's even though they are very different organism?

Birds and dogs, despite being vastly different organisms, both use DNA as the fundamental blueprint for building their bodies because all living organisms share a common genetic code. DNA contains sequences of nucleotides that encode instructions for synthesizing proteins, which play crucial roles in structure, function, and regulation of cells. The similarities in DNA across species highlight the shared evolutionary heritage, while the differences in their genetic sequences lead to the diverse traits and characteristics observed in birds and dogs. Ultimately, DNA serves as a universal language of life, guiding development and functioning in a wide variety of organisms.