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Prokaryotic cells are believed to have evolved from simpler, ancestral forms of life known as protocells, which were likely composed of organic molecules and had basic membrane structures. These early cellular forms emerged around 3.5 to 4 billion years ago in a primordial environment conducive to chemical reactions. Through processes such as natural selection and genetic variation, these protocells gradually developed the characteristics that define prokaryotic cells, including the ability to replicate and metabolize nutrients. Ultimately, this evolution set the foundation for the diversity of life we see today.
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What are the oldest cells on earth?
The first cells on earth were likely prokaryotic. This is because the prokaryotic cells are not complex like eukaryotic cells.
Are prokaryotic cells the oldest living things?
No, prokaryotic cells are not the oldest living things. The oldest living things on Earth are believed to be bacteria-like organisms that existed billions of years ago, before more complex life forms evolved. These early organisms were likely similar to present-day prokaryotic cells in structure and function.
Is the oldest known fossils prokaryotic or eukaryotic?
The oldest known fossils are prokaryotic. These fossils, dating back over 3.5 billion years, are believed to be ancient bacteria and archaea. Eukaryotic cells are thought to have evolved later.
Are cells prokaryotic?
No, cells can be either prokaryotic or eukaryotic. Prokaryotic cells lack a true nucleus and membrane-bound organelles, while eukaryotic cells have a nucleus and other membrane-bound organelles. Examples of prokaryotic cells include bacteria, while examples of eukaryotic cells include plant and animal cells.
Why would engulfing these smaller prokaryotic cells be an advantage to the larger prokaryotic cells?
Engulfing smaller prokaryotic cells would provide the larger prokaryotic cells with a potential source of nutrients and energy, aiding in their survival and growth. It also prevents competition for resources and reduces predation pressure on the larger prokaryotic cells.
The presence of which organelle indicates that eukaryotic cells have evolved from prokaryotic cells?
The presence of mitochondria in eukaryotic cells indicates that they have evolved from prokaryotic cells. Mitochondria have their own DNA and ribosomes, similar to prokaryotic cells, and are believed to have originated from a symbiotic relationship between an ancestral prokaryotic cell and an archaeon.
Which organelle indicates that eukaryotic cells have evolved from prokaryotic cells?
Mitochondria, which are thought to have originated from a symbiotic relationship between early eukaryotic cells and aerobic bacteria, provide evidence that eukaryotic cells have evolved from prokaryotic cells. Mitochondria have their own DNA and ribosomes, similar to prokaryotic cells, and carry out cellular respiration, a process that is also similar to bacterial metabolism.
What is cellular organization?
It basically means all cells are divided into two types: prokaryotic cells and eukaryotic cells. Prokaryotic cells evolved 3.5 billion years ago and have a nucleus. Examples of a Prokaryotic cell include protista, fungi, plants and animals. Eukaryotic cells evolved 1.5 billion years ago and do not have a nucleus. An example of a Eukaryotic cell is bacteria.
Is the evolution of the prokaryote before a eukaryote cell?
Yes, prokaryotic cells evolved before eukaryotic cells. Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells have both. It is believed that eukaryotic cells evolved from prokaryotic cells through a process called endosymbiosis.
What is the difference between something eukaryotic and something prokaryotic?
There are quite a few differences between eukaryotic and prokaryotic cells. Prokaryotic cells do not have a nucleus, while eukaryotic cells do. Prokaryotic cells are not found in humans while eukaryotic cells are. Prokaryotic cells are primitive while eukaryotic cells are much more evolved.
Is mitochondria a prokaryotic cell?
Mitochondria are eukariyotic organells.They were evolved by prokariyotic aerobic cells.
What are the evolutionary relationships between prokaryotic and eukaryotic cells?
Mitochondria and chloroplasts have prokaryote-like features. For example, although most of the DNA in eukaryotic cells resides in the nucleus, both mitochondria and chloroplasts have DNA molecules in their inner compartments. Mitochondrial and chloroplastic ribosomes are similar to the ribosomes of prokaryotes. The endosymbiont theory proposes that eukaryotic organisms evolved from prokaryotic ancestors; this idea supports the notion that organelles evolved from prokaryotic organisms that originally lived inside larger cells, eventually losing the ability to function as autonomous organisms
Mitochondria prokaryotic or eukaryotic?
Mitochondria are considered to be eukaryotic organelles. They have their own DNA and ribosomes, and are thought to have evolved from engulfed prokaryotic cells in a symbiotic relationship with eukaryotic cells.
What organelle does the endosymbiotic theory suggest evolved from the symbiotic relationships between prokaryotic cells?
The endosymbiotic theory suggests that mitochondria and chloroplasts evolved from symbiotic relationships between prokaryotic cells. More specifically, mitochondria are proposed to have originated from aerobic bacteria, while chloroplasts are thought to have originated from photosynthetic bacteria.
Is the following true or false The ancestor of all eukaryotic cells evolved about 2 billion years ago?
True. The ancestor of all eukaryotic cells is thought to have evolved approximately 2 billion years ago through a process of endosymbiosis, where prokaryotic cells engulfed other prokaryotic cells, leading to the formation of more complex eukaryotic cells.
Did the evolution of prokaryotes preceed the evolution of eukaryotes?
Yes, prokaryotes are believed to have evolved before eukaryotes. Eukaryotes likely evolved through a process of endosymbiosis, where prokaryotic cells engulfed other prokaryotic cells to form a symbiotic relationship, leading to the development of cellular organelles.
What role does the endosymbiont theory play in explaining the origin of eukaryotic cells?
The endosymbiont theory explains that eukaryotic cells evolved from a symbiotic relationship between different types of prokaryotic cells. This theory suggests that mitochondria and chloroplasts, which are organelles in eukaryotic cells, were once independent prokaryotic cells that were engulfed by a larger host cell. Over time, these prokaryotic cells became integrated into the host cell and eventually evolved into the organelles we see in eukaryotic cells today. This theory helps to explain the presence of these organelles in eukaryotic cells and provides insight into the evolutionary history of these complex cells.
