The idea that the eukaryotic cell is a group of microorganisms was first suggested in the 1920s by the American biologist Ivan Wallin. The endosymbiont theory of mitochondria and chloroplasts was proposed by Lynn Margulis of the University of Massachusetts Amherst.

Their evolution is explained by endosymbiotic theory. Mitochondria and chloroplasts evolved from prokaryotic organisms. Eukaryotic cells would go on to evolve into the diversity of eukaryotes we know today.

The Endosymbiotic Theory states that the mitochondria and chloroplast in eukaryotic cells were once aerobic bacteria (prokaryote) that were ingested by a large anaerobic bacteria (prokaryote). This theory explains the origin of eukaryotic cells.

Terms in this set (6)

• Prokaryotic cell membrane folded into cytoplasm.
• Nuclear membrane, endoplasmic recticulum, and golgi body are now independent of external membrane.
• Ancestoral eukaryote engulfed, but did not kill prokaryote.
• The prokaryote survived inside the eukaryote and each evolved a dependence of each other.

Based on decades of accumulated evidence, the scientific community supports Margulis’s ideas: endosymbiosis is the best explanation for the evolution of the eukaryotic cell. What’s more, the evidence for endosymbiosis applies not only to mitochondria, but to other cellular organelles as well.

How important is endosymbiosis? How important is endosymbiosis? Endosymbiosis explains the origin of mitochondria and chloroplasts, but could it also explain other features of the eukaryotic cell? Maybe.

Endosymbiotic theory is important as it explains the origin of the chroloplast and mitochondria. It also explains the formation of the eukaryotic cells. Explanation; Endosymbiotic theory explains the origins of eukaryotic cell organelles such as mitochondria in animals and fungi and chloroplasts in plants.

Mitochondria arose through a fateful endosymbiosis more than 1.45 billion years ago.

The domains are bacteria, bacteria-like microbes called Archaea, and eukaryotes, the group that includes plants and other multicellular species, such as humans. …

Most of us know that at some point in our evolutionary history around 600 million years ago, single-celled organisms evolved into more complex multicellular life. The evolution took just 50 weeks, and was triggered by the introduction of a simple predator.

The human body, for instance, comprises about 10,000 billion cells. An organism which is made up of more than a single cell is called multicellular. The number of cells can be very high. The human body, for instance, comprises about 10,000 billion cells.

So even though its commonly accepted that the first organisms were some sort of photosynthesizing organism, similar to a plant, a modern plant cannot evolve into an animal any more than an animal can evolve into a plant.

It is likely that eukaryotic cells, of which humans are made, evolved from bacteria about two billion years ago. One theory is that eukaryotic cells evolved via a symbiotic relationship between two independent prokaryotic bacteria.

If you think about it, the fact that a single cell can grow into an adult with trillions of cells is pretty awesome. What is allowing us to grow at such a fast and furious pace? It’s a process called the cell cycle. Entire organisms grow, and develop by going through the cell cycle again and again.

All life on Earth shares a single common ancestor, a new statistical analysis confirms. Because microorganisms of different species often swap genes, some scientists have proposed that multiple primordial life forms could have tossed their genetic material into life’s mix, creating a web, rather than a tree of life.

Concept 40 Living things share common genes. All living organisms store genetic information using the same molecules — DNA and RNA. Genes are maintained over an organism’s evolution, however, genes can also be exchanged or “stolen” from other organisms.

The reconstruction of the genome and phenotype of the LUCA is a major challenge in evolutionary biology. Given that all life forms are associated with viruses and/or other mobile genetic elements, there is no doubt that the LUCA was a host to viruses.