Final Answer:
DNA is referred to as the B) 'blueprint of life' because it contains the plans for building an organism.
Step-by-step explanation:
The analogy of DNA as the 'blueprint of life' highlights its fundamental role in encoding the genetic information necessary for the construction and functioning of living organisms. The specific instructions for the development, growth, and maintenance of an organism are embedded in the sequence of nucleotide bases within the DNA molecule. Each gene, a segment of DNA, carries the information needed to produce specific proteins and perform particular functions in the cell, ultimately contributing to the overall characteristics and traits of the organism.
The concept of a blueprint implies a comprehensive and detailed plan for construction. Similarly, DNA provides the intricate instructions that govern the synthesis of proteins, the building blocks of cells and tissues. This process is vital for the development and sustenance of life. The blueprint metaphor captures the precision and specificity of the genetic code, emphasizing the remarkable complexity and order inherent in the information stored within DNA.
Unlike the options suggesting a fingerprint, relaying messages, or having a blue color, the correct answer (B) aligns with the foundational role of DNA as the repository of genetic instructions. This designation underscores the significance of DNA in orchestrating the intricate processes that define life, making it a fitting metaphorical blueprint for the complexity and diversity observed in living organisms.