Characteristics Of Bacteria, Archaea, And Eukaryote

There are two basic cells, prokaryotes and eukaryotic. The prokaryotes are molecules surrounded by membrane and cell wall, it has no membrane-bound nucleus and are multicellular. All bacteria, are cells of members Kingdom Prokaryotae, are called prokaryotic. They have a simple structure, do not have complex organelles and internal membranes. Where the eukaryotes is a more complex cell than the prokaryotes which are, protoctista animal, fungi, or plant cells.

Bacteria are single celled organisms. Some classify them as a separate (fourth) kingdom on the tree of life.

The first result of importance was the result of the Gram stain. The observations of the unknown bacteria from the slant culture after Gram staining showed that the unknown bacteria were Gram negative bacilli (Image 1). After determining the unknown bacteria was Gram negative, an oxidase test was conducted on a sample from the slant culture. The cotton swap with the sample of bacteria did not change color when the oxidase reagent was applied, thus providing a negative result. With a negative oxidase test, further tests were conducted to determine various characteristics of the unknown bacteria. A MR-VP broth was inoculated with a sample from a slant culture of unknown bacteria. After incubation, the methyl red reagent was added to the broth, and the broth turned red, providing a positive result (Image 2). An EMB agar streak plate was inoculated with a sample from a slant culture of the unknown bacteria, and after incubation, growth was found on the plate, providing a positive result (Image 3). A Citrate agar slant was inoculated, and after incubation, growth was found on the media, providing a positive result (Image 4). A Urea agar slant was inoculated, and after incubation, the agar had changed from a peach color to a bright pink color, providing a positive result (Image 5). Using the flowchart (Figure 1) developed from the Table of Expected Results, the lab partners started at the oxidase test. Given the negative result of the oxidase test, the flowchart is

In this experiment, we were given a sample of an unknown bacterium and asked to classify it based on its physical and metabolic properties. We hypothesized that the unknown organism was Alcaligenes faecalis, a motile Gram-negative bacillus that resides in water, soil, blood, urine, and feces (Herrera n.p.) It was first isolated in 1896 by Petruschky, who

Clostridia: rod-shaped, obligate anaerobes, some form endospores, produce potent toxins that cause a variety of diseases in humans. Important in medicine & industry (Botox & oral plaque). Examples of clostridia include C. tetani (cause tetanus), C. perfringens ( causes gangrene), C. botulinum ( causes botulism) and C. difficle (severe diarrhea). Microbes related to Clostridium include: Epulopiscium - a giant bacterium that can be seen without a microscope; Some clostridia are sulfate-reducing microbes – they produce H2S from elemental sulfur during anaerobic respiration; and Selenomonas – a Vibrio-shaped bacteria, live as part of the biofilm (plaque) on teeth of warm-blooded animals. Selenomonas is unusual because even though it has a typical gram-positive RNA sequence, it has a negative Gram reaction – stains pink.

First things first, taxonomy is the identification, description and the naming or nomenclature of organisms. The two domains are Bacteria and Archaea. Archaea is most related animals and plants also metabolic pathways. Bacteria most related to human pathogens and soil or dirt. The Domains are put together by genetic characteristics. Where Archaea for the most part are primitive and are adapted for extreme habitats and modes for nutrition we can see some similarities, with bacteria that also can live in extreme environments like thermal vents. The two might be cut from the same cloth and both are needed for life on earth to happen the most looked at for us is bacterial because that is the most harmful to

Ribosomes then started copy themselves into cell-like structure with a thin membrane and cytoplasm. Eventually, cells starting storing DNA. Lateral transfer diversified the cells genetic makeup. From this community of cells came the three domains, known as bacteria, eukaryotes, and archaea. Bacteria and archaea are together called

The purpose of this study is to identify four unknown organisms. The unknown organisms have been assigned randomly to six-research groups by Professor Hoffman. Each research group was provided two eukaryotes and two prokaryotes. The unknown organisms will fall into the following classifications: bacteria, algae, fungi, or protozoans. All living organisms are organized into one of three domains of life, Bacteria, Archaea, and Eukarya.

Just like eukaryote species, not all bacteria species are identical in the way they behave, grow or interact with their environment (Mujtaba & DeJarnette, 2012). Microbes can be unique in the way they grow on nutrient agar (NA) plates. How their colonies form on the agar plates can also be an exclusive property of specific bacteria species. Microbes can grow in the presence of different nutrients, environments and can also be inhibited by or thrive in the presence of specific agents in the medium. For example inoculating a blood agar plate with the organism, can indicate its hemolysis activity, which it will fall in one of the three groups alpha (α), beta (β), or gamma (γ).

8. Domain- A classification of life that includes Archaea, Bacteria, and Eukarya. This is above Kingdom.

Domain archaea- Along with bacteria the domain archaea is a prokaryote cell meaning it consists of one single cell. However archaeal organisms can be found in areas where the earth 's most intense natural resources are present. Areas including Yellowstone National park where there are many geysers along with places including Hawaii.

Bacteria are single-celled microorganisms. Their cell structure is very unique because they don't have a nucleus, and most bacteria have cell walls similar to plant cells. They come in different shapes including rods, spirals, and spheres. Some bacteria can "swim" around using their tails called flagella. Others just stay still or move with the others. Most bacteria aren't dangerous, but some can make us sick. These bacteria are called pathogens. Pathogens can cause diseases in animals and plants. Some examples of pathogens are food poisoning, pneumonia, and tetanus. This online

Microbiology is a study of small living organisms that are hard to be seen without using the microscope; such as bacteria, archaea, viruses, and protozoa. Fungi are different, a majority are big enough for us to see. They’re all have a long history of living on Earth, the scientist also believes they are the first living things that are existing way before mammals or human. Those microorganisms are everywhere around us, some are harmless and some can cause serious diseases. The condition and environment are different for every microorganism, some can live in the cold and a few can live in an area where hardly any living things can survive in. However, the bacteria that I found the most interesting in is Alcaligenes faecalis bacterium because

comprises a single cell (unicellular), cell clusters or multicellular relatively complex organisms. They are small living forms of life, which we cannot see with the naked eye. Bacteria, yeast and molds are three types of microorganisms. Some people often confuse, and almost always misunderstand, their functions, but they are just as real and alive as you are. They eat and grow. They reproduce and die.

The era of microbiology dates back to seventeenth century when Antonie van Leeuwenhoek for the first time provided the evidence for the existence of prokaryotes. The prokaryotes constitute the domains Archaea and Bacteria and consists of million of species. Being the first one to inhabit the Earth about 3.8 billion years ago, prokaryotes represent a large unnoticed portion of the Earth’s biota. The earlier evolution of prokaryotes in contrast to eukaryotes had led to their extraordinary diversity and survival in different habitats. Microbial diversity, in its simpler form, can be represented as the sum of all different microbial species in an environment. It denotes the presence of ‘microbially living forms’ in a defined area. This diversity