Which of the following statements demonstrates unity in the diversity of life?

• A. All living organisms use DNA as their genetic material.
• B. Species evolve independently without any common ancestry.
• C. Different species have unique metabolic pathways.
• D. Organisms vary greatly in their physical appearance.

Answer: (A)

Verified step by step guidance

1. Begin by understanding the concept of 'unity in the diversity of life.' This refers to the idea that despite the vast differences among living organisms, there are fundamental similarities that unite them.
2. Consider the role of DNA in living organisms. DNA is the universal genetic material found in all known forms of life, from the simplest bacteria to complex multicellular organisms. This commonality is a key example of unity.
3. Evaluate the statement 'All living organisms use DNA as their genetic material.' This statement highlights a fundamental similarity among all life forms, demonstrating unity despite their diversity.
4. Analyze the other statements: 'Species evolve independently without any common ancestry,' 'Different species have unique metabolic pathways,' and 'Organisms vary greatly in their physical appearance.' These statements emphasize diversity rather than unity.
5. Conclude that the statement 'All living organisms use DNA as their genetic material' best demonstrates unity in the diversity of life, as it underscores a shared characteristic among all living organisms.