Prokaryote

Archaea encompass a generalised classification known as the prokaryotes. This definition follows the extensive similarities between the two domains, such as their manner of gene expression, their fundamental metabolic pathways, as well as their lack of membrane bound organelles, and compartmentalisation. Due to the cellular compartmentalisation that eukaryotes exhibit, as well as more complex modes of metabolism and replication, prokaryotes are generally considered to be the precursors to eukaryotic

abolishment of the prokaryote/eukaryote dichotomy, first formally proposed in 1990 by Carl Woese and colleagues (Woese, Kandler and Wheelis, 1990) and yet still unresolved in the present day. Prokaryotes were defined in 1962 by Stanier and van Niel as “anucleate cells, without membrane enclosed organelles of respiration or photosynthesis, divided by fission not mitosis, and used peptidoglycan to strengthen their walls” (Mayr, 1998). This definition and the creation of the prokaryote/eukaryote dichotomy

eukaryotes can be considered structurally advanced as its organelles are enclosed by a membrane, making it larger in size and stronger compared to a prokaryote. Both prokaryotes and eukaryotes have the ability of movement, but the eukaryotes is more complex. Although, the eukaryotic cell is more structurally advanced to that of a prokaryotic cell, prokaryotes are simple in nature but are capable of performing the same processes to that of

Is the concept of the prokaryote valid and useful or fundamentally flawed? The term ‘prokaryote’ was coined in 1925 by Édouard Chatton in his 1925 paper ‘Pansporella perplex: Reflections on the Biology and Phylogeny of the Protozoa.’ (Chatton, 1925). Since then the term, when paired with its dichotomous counterpart ‘eukaryote’, has formed the fundamental basis for classification in biology. However in recent years the concept of the prokaryote has been wildly contested as being inaccurate (amongst

I. Introduction Perhaps one of the first lessons one is taught about bacteria is that they constitute the prokaryotic domain of life, while humans and most other readily visible life forms are firmly rooted in the eukaryotic domain. These domains diverged many millions of years ago from a common ancestor and, while the eukaryotic branch later split into eukaryotic and archaeal domains, it maintained its separation from the prokaryotic domain (Woese et al., 1990). Prokaryotic and eukaryotic genomes

Is the concept of prokaryotes valid and useful or fundamentally flawed? Since the establishment of the basic concept of classification of organisms by Carl Linnaeus (Encyclopaedia Britannica) and Charles Darwin’s theory of evolution, various ideas and concepts have been suggested. After being repeatedly reviewed by a number of experts, some of them are accepted and this has enabled scientists to classify organisms, to recognise the connections between them despite of different physical appearance

Compare and contrast the Five kingdom and three domain classification system Classification is the method used by scientists to order living organisms. All species have a unique classification that results in a binomial name. classification is used to make it easier for different species to be identified by scientists. The current system, the Three Domain System , groups organisms primarily based on differences in ribosomal RNA structure. Ribosomal RNA is a molecular building block for ribosomes 

before we delve into these questions it is important to operationally define reproduction. In this case reproduction has evolved over time into three forms of itself: simple, collective, and scaffolded. Simple can be easily defined in the form of prokaryotes and bacteria. Collective can be described as humans, as we have reproducing parts inside of ourselves(cells). And scaffolded can be explained as reproductive objects that reproduce based entirely on surrounding resources, with the example being

celled prokaryotic, so they don 't contain a nucleus. Archaea live in water especially salty region, and also come from animal stomachs. Archaea are also different from bacteria. Eubacteria are many different cells which belong to the group of prokaryotes. Eubacteria also have different types of shapes such as spirals and spheres. Eukarya are organisms that have cells with nucleus. The examples are protist, animal, fungi, and plants. Protista is part of eukarya that isn 't fungus, plant, or animal

The cell. The most basic form of life, and yet the most complex structure Mother Nature has to offer. For hundreds of years, man has tried to crack its codes, to try and find what makes it tick; but it seems that the deeper we go into the study of cells, the more questions appear too. The purpose of this entire essay is to educate my readers on cells, our discovery of cells and the cell theory, where we believe they first appeared, and how we have learned to manipulate cells to cure diseases like