describe the emergence of prokaryotes and eukaryotes and their respective roles in the evolution of life on earth. briefly describe them in one paragraph

Prokaryotes, which are simple unicellular organisms lacking a nucleus, emerged around 3.5 billion years ago and are considered the most ancient form of life on Earth. They include bacteria and archaea, playing crucial roles in nutrient cycling, decomposition, and the development of early ecosystems. Eukaryotes, which evolved approximately 1.6 billion years ago, possess complex cells with a defined nucleus and organelles, enabling diverse forms and functions, including multicellularity. The transition from prokaryotic to eukaryotic life set the stage for the evolutionary advancements that led to plants, animals, and fungi. Together, these two groups of organisms shaped the planet's biosphere, influencing biochemical processes, symbiotic relationships, and the overall complexity of life on Earth.