All protists are eukaryotic, meaning they feature a cellular structure with nuclei to contain their genetic material. Also called protozoans, which means "first animals," all protists prefer a moist environment and are found where there is perpetually moist soil or in freshwater and saltwater bodies of water.Know More
Along with the nucleus, most protists also feature mitochondria which aid in metabolic functions, and vacuoles which aid in digestion. This means that despite sometimes being of very small size, protists are relatively complex organizations from a functional standpoint.
Other than these basic similarities, the nature and features of protists vastly vary. They may be unicellular or multicellular and range in size from microscopic to 300 feet in length. However, even in the largest multicellular protists, there is no cellular specialization or differentiation in tissues types. While protists are not classified as plants, animals or fungi, they may display plant-like, animal-like or fungi-like characteristics.
The Kingdom Protista was established by the scientist Ernst Haeckel in 1866. It was not officially recognized by the larger scientific community until a century later in the 1960's. The Kingdom Protista is often called a"junk drawer" since it comprises all the eukaryotics that cannot be classified into any other kingdom.Learn more about Biology
Bacterial transduction is the process by which a bacterium's genetic material is transferred to a second bacterium through a viral medium. The types of viruses that can carry out this process are called bacteriophages, which preferentially infect bacteria and use them to produce virus progeny.Full Answer >
The chief difference between prions and viruses is that, while both cause disease, prions have no genetic material of their own. According to Merck, prions also differ from viruses in that prion-caused conditions are always fatal. Most viral illnesses can be survived. Prions tend to strike at the nervous system more often than at any other part of the body.Full Answer >
Structures inside a eukaryotic cell include a nucleus, genetic material, a plasma membrane, ribosomes and a cytoplasm. The majority of eukaryotic cells also include internal structures within their membranes, known as organelles. Mitochrondria, golgi bodies, lysosomes, endoplasmic reticulum and vesicles are the different types of organelles.Full Answer >
Protists live in lakes, rivers, oceans, ponds and wet sediments. Since they are microscopic organisms, they can live in just about any part of the world that has traces of water to support their life.Full Answer >