Earth
Best Answer: Bacterial cells are prokaryotic, which means they have DNA, but NO nucleus or membrane-bound organelles. A nucleus is a feature of a eukaryotic cell. A nucleus is DNA surrounded by a membrane;it's where the DNA is stored. The main difference is that bacteria are prokaryotic -- they have no nucleus and they have no organelles with membranes. The other organisms are all eukaryotic -- they have nuclei and membrane-bound organelles in their cells. ecolink · 8 years ago. Thumbs up. 2. Thumbs down. 0. Comment. Add a comment. Cells of Bacteria: The cells of bacteria are different from those of plants and animals in many ways, the most obvious of which is that bacteria lack a nucleus and other membrane-bound organelles (except ribosomes). Unlike animals and plants, bacteria have pili, flagella, and most have a cell capsule. Bacterial cells include the following: Diet: Bacteria have a wide range of diets. Some are heterotrophs (they eat other organisms) and others are autotrophs (they make their own food). Most heterotrophic bacteria are saprobes (they absorb dead organic material like rotting flesh). There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water. There are approximately 5×10 30 bacteria on Earth, forming a biomass which exceeds that of all plants and animals. In most bacteria, a cell wall is present on the outside of the cell membrane. The cell membrane and cell wall comprise the cell envelope. A common bacterial cell wall material is peptidoglycan (called murein in older sources), which is made from polysaccharide chains cross-linked by peptides containing D-amino acids. A unicellular organism, also known as a single-celled organism, is an organism that consists of only one cell, unlike a multicellular organism that consists of more than one cell. Historically the simple single celled organisms have sometimes been referred to as Monads.  They grow on and in other bacteria, worms, insects, plants, animals, and people. Bacteria are prokaryotes. Prokaryotic cells possess simpler structures than eukaryotic cells, since they do not have a nucleus, other membrane bound organelles, or a cytoskeleton.  Bacteria are found in every habitat on Earth: soil, rock, oceans and even arctic snow. Some live in or on other organisms including plants and animals including humans. There are approximately 10 times as many bacterial cells as human cells in the human body. A lot of these bacterial cells are found lining the digestive system. The cell structure is simpler than that of other organisms as there is no nucleus or membrane bound organelles. Instead their control centre containing the genetic information is contained in a single loop of DNA. Some bacteria have an extra circle of genetic material called a plasmid. A bacteria cell is an organism. Humans have eukaryotic cells and are therefore in the Eukarya Domain. Domains are large groupings that include multiple kingdoms. Eukarya are all the eukaryotes, including animals, plants, fungi, and protists. JJ's*Mommy · 6 years ago. Thumbs up. 0. Thumbs down. 0. Both a bacteria cell or an oak leaf is an organism Humans belong to animals In biology, an organism is any living system (such as animal, plant, fungus, or micro-organism).
https://answers.yahoo.com/question/index?qid=20080225095802AAqNJkq http://www.enchantedlearning.com/subjects/bacterium/ https://en.wikipedia.org/wiki/Bacteria https://en.wikipedia.org/wiki/Unicellular_organism http://www.biologyreference.com/Ar-Bi/Bacterial-Cell.html http://www.microbiologyonline.org.uk/about-microbiology/introducing-microbes/bacteria https://answers.yahoo.com/question/index?qid=20090901153711AATR6lm
what are the bacterial cells organisms