Some bacteria manufacture and absorb their own food, while others must consume substances like living organisms or decaying material through their cell walls. Bacteria break down food in a process called respiration, which for some strains of bacteria requires oxygen to complete.Continue Reading
Many types of bacteria are able to eat a variety of things like milk, meat, oil and gas. Some bacteria live in the digestive tracts of humans and other animals and assist the body by helping to digest food and eating other, harmful bacteria. Escherichia coli, more commonly known as E. coli, is one bacteria that lives in the human body and survives by digesting food, absorbing some of the nutrients and releasing vitamin K. The harmful version of the E. coli bacteria causes people to become sick when ingested.
In order to eat, some bacteria absorb food through their cell walls. Many are autotrophs, meaning they make their own food using things like sunlight, water and soil, similar to the photosynthesis method many plants use. They absorb the food they produce and release oxygen into the air.
Bacteria are also used to make food like cheeses and yogurt. They eat the milk sugars and convert them to lactic acid, with softer cheeses having more bacteria than hard cheese.Learn more about Cells
Cells are considered the smallest unit of life because they are the smallest components in living things, and some organisms, such as bacteria, are made up of single cells. In addition, each part of the animal body, including blood vessels, organs and skin, is made up of a congregation of cells.Full Answer >
One main difference between protists and bacteria is that protists are eukaryotic organisms, while bacteria are prokaryotes. Another difference is that protists belong to the kingdom Protista, while bacteria are members of the Monera kingdom. Bacteria are uni-cellular organisms that do not contain organelles like a nucleus or chloroplasts.Full Answer >
According to Reference.com, cellular organisms that do not have a distinct nucleus, such as bacteria, are called prokaryotes. They are distinct from the eukaryotes, which are the cellular organisms that contain a nucleus.Full Answer >
Prokaryotic organisms fall into two domains: bacteria and archaea, which contain autotrophs and heterotrophs. Regardless of domain, prokaryotes share common traits of being single-celled organisms that are the smallest and simplest in composition and structure of all organisms. Prokaryotes are further divided into groups within their domains; both groups contain heterotrophs and autotrophs, and a variety of species.Full Answer >