BioSphere University

🧬 DNA is the universal code of life — but it wasn’t always the star of the show.

Before DNA took over, scientists believe life may have started with RNA. Unlike DNA, RNA can both store genetic information and catalyze chemical reactions, acting like a primitive enzyme. This idea is known as the RNA world hypothesis.

Over time, DNA became the more stable storage molecule, and proteins took over most catalytic functions — but RNA may have been the original multitasker that kicked off all biological complexity.

This ancient shift — from RNA to DNA and proteins — marks one of the most important transitions in the history of life. Without it, complex organisms, evolution, and the tree of life wouldn’t exist.

#TheOriginByFaiyas #RNAWorld #OriginOfLife #MolecularBiology #BiologyFacts

9 months ago | [YT] | 0

BioSphere University

🧬 Life on Earth began approximately 3.5 to 4 billion years ago with simple, single-celled organisms — most likely prokaryotes. These cells had no nucleus and were structurally simple, but they were capable of basic life functions like metabolism and reproduction.

One of the most significant evolutionary milestones was the emergence of eukaryotic cells, which have a nucleus and complex internal structures. This likely happened through endosymbiosis, where one cell engulfed another, and instead of digesting it, they formed a mutually beneficial relationship.

Eventually, some of these eukaryotic cells began living in colonies. Over time, these colonies evolved into multicellular organisms, where cells took on specialized roles — a major leap that made complex life possible.

This transition from single-celled to multicellular life set the foundation for all plants, animals, and fungi we see today — including us.

#Biology #OriginOfLife #CellEvolution #TheOriginByFaiyas #ScienceFacts

9 months ago | [YT] | 1