A protist (/ ˈ p r oʊ t ɪ s t / PROH-tist) or protoctist is any eukaryotic organism that is not an animal, plant, or fungus. Protists do not form a natural group, or clade, but are a paraphyletic grouping of all descendants of the last eukaryotic common ancestor excluding plants, animals, and fungi.

2025年2月28日 · protist, any member of a group of diverse eukaryotic, predominantly unicellular microscopic organisms. They may share certain morphological and physiological characteristics with animals or plants or both.

2017年4月27日 · Protists are a group of loosely connected, mostly unicellular eukaryotic organisms that are not plants, animals or fungi. There is no single feature such as evolutionary history or morphology common to all these organisms and they are unofficially placed under a separate kingdom called Protista.

2023年2月2日 · Protists are the oldest eukaryotic microorganisms, having a nucleus and other membrane-bound organelles. Since they do not wholly fit into other groups like plants, animals, bacteria, or fungi, they are categorized under a separate kingdom called Protista.

2022年2月14日 · Protists are a diverse collection of organisms that do not fit into animal, plant, bacteria or fungi groups. While exceptions exist, they are primarily microscopic and made up of a single cell...

2024年3月7日 · Protista are primitive eukaryotic organisms and exhibit a wide range of diversity in size, shape, and life forms. They can be unicellular, multicellular, or colonial. Protista contains a defined nucleus and membrane-bound organelles, such as mitochondria, endoplasmic reticulum, Golgi apparatus, and sometimes chloroplasts in autotrophs.

Protists are simple eukaryotic organisms that are neither plants nor animals or fungi. Protists are unicellular in nature but can also be found as a colony of cells. Most protists live in water, damp terrestrial environments or even as parasites. The term ‘Protista’ is derived from the Greek word “protistos”, meaning “ the very first “.

2023年8月25日 · Protist (biology definition): Any of a group of eukaryotic organisms belonging to the Kingdom Protista. Protists include: (1) protozoa , the animal-like protists, (2) algae , the plant-like protists, and (3) slime molds and water molds, the fungus-like protists.

Protist parasites include the causative agents of malaria, African sleeping sickness, and waterborne gastroenteritis in humans. Other protist pathogens prey on plants, effecting massive destruction of food crops.

2021年9月22日 · Protists include the single-celled eukaryotes living in pond water (Figure 13.3.1), although protist species live in a variety of other aquatic and terrestrial environments, and occupy many different niches. Not all protists are microscopic and single-celled; there exist some very large multicellular species, such as the kelps.