Endosymbiosis has been directly observed!

The Paper:
Auto-/heterotrophic endosymbiosis evolves in a mature stage of ecosystem development in a microcosm composed of an alga, a bacterium and a ciliate
Abstract
We investigate an ecological mechanism by which endosymbiotic associations evolve, with a particular focus on the relationship between the evolution of endosymbiosis between auto- and heterotrophic organisms, and the stages of ecosystem development. For this purpose we conducted a long-term microcosm culture composed of three species, a green alga (Chlorella vulgaris), a bacterium (Escherichia coli), and a ciliated protozoan (Tetrahymena thermophila) for 3 years. During this culture T. thermophila cells harboring Chlorella cells emerged by phagocytotic uptake, and increased in frequency, reaching ca. 80-90%. This level was maintained in the late stage of ecosystem dynamics. Analysis of the ecosystem dynamics in the microcosm revealed that a complex causal process through direct/indirect interactions among ecosystem components led to reduction in dissolved O2 and food (E. coli) available to the T. thermophila, which gave a selective advantage to the organisms in the endosymbiotic association. This result suggests that the endosymbiosis evolves in a mature stage of ecosystem development, where reproduction and survival of prospective partner organisms is highly resource-limited and density-dependent, favoring efficient matter/energy transfers among participating organisms due to physical proximity. Consequently, a complex web of interactions and pathways of matter/energy flow in ecosystem evolves from an initially simple one.
Read the entire paper for free here: www.researchgate.net/publicat...

[@user-my1xh4wp5f]

Which brings me to the theory that our white blood cells did this when we were cells ourselves

[@okaycook1307]

I don’t think we had white blood cells when we were cells millions of years ago

[@ProffessorYellow]

Our Gut biome system over time no doubt

[@legendaryboyyash]

Damn this is what you would learn in years in school

[@mat41174]

Thankyou. Love your work

[@oonmm]

Oh no the cell was so sad after dividing! It had that :( sad face!

[@jkoenig2677]

Making the claim that this was recently observed is wrong as far as I can find

[@quimblyjones9767]

God that's so hot 🥵

[@denki2558]

vore

[@Capachinno]

Lolz😂

[@Avicaris]

“But it’s still just bacteria!” /s

[@naromsky]

Eppur si muove.

[@thebogsofmordor7356]

Protist splits: 😕😕

[@AIin1771]

"was seen swallowing". Believe me, no one saw that

[@davidrosen5137]

You can… using bright field microscopy.