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Writer's pictureBelle Webb

RNA: The Thread That Binds All Life

You share more with a tree than you realize. Despite the vast diversity of life on Earth, all living organisms share a common molecular foundation that highlights the interconnectedness of life.



All living things on Earth, no matter how different they may seem, are connected at a deep molecular level. Humans and trees, for example, couldn’t look or act more differently—one walks, talks, and thinks, while the other stands still, growing quietly and reaching for the sun.


Yet beneath these differences lies a shared foundation. Both start from RNA, a molecule that helps pass along the instructions for life. Trees and humans rely on the same basic cellular machinery to grow, repair, and thrive, and we share similar genetic and metabolic processes inherited from a common ancestor billions of years ago. Even though humans breathe in oxygen and release carbon dioxide while trees do the opposite, this exchange is a perfect example of how intertwined we are.


Life on Earth is a grand web, where every organism, from the tiniest microbe to the tallest redwood, is connected by the same threads of biochemistry and evolution.


Similarities:

  1. Common Biochemical Origins:

    • Both humans and trees rely on RNA and DNA for storing and transmitting genetic information. These molecules likely evolved from a common ancestor in the early history of life on Earth.

  2. Cellular Machinery:

    • Both humans and trees use ribosomes (built with RNA and proteins) to translate genetic instructions into proteins, the workhorses of life.

  3. Metabolic Processes:

    • Both rely on basic metabolic processes like the citric acid cycle (Krebs cycle) to produce energy. While plants use photosynthesis for energy, the biochemical reactions still share overlaps with other life forms.

  4. Evolutionary Connection:

    • Humans and trees share genes inherited from the last universal common ancestor (LUCA). For example, some genes involved in cell division, protein synthesis, and basic metabolism are conserved across all life.


Philosophical Perspective:

From a systems biology perspective, humans and trees are just different expressions of life’s fundamental toolkit, adapted to different ecological niches. Both are part of the Earth's biosphere, interconnected in ways like oxygen production (from trees) and carbon dioxide release (from animals).


If you consider the idea that we’re all made from the same atoms forged in stars and follow the same natural laws, the distinctions between us and a tree might start to feel less stark. At the core, life is a spectrum of shared biochemistry and divergent adaptations.



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