Kingdom Protista

Editor's Notes

1. KINGDOM PROTISTA – The entire kingdom is Kingdom Protista, which is made up of protists (protozoa, algae and slime molds). (This may differ in Spain, I’m not sure, but this is what it is in the USA).
2. They are eukaryotic organisms. They can be unicellular or multicellular. They are very small in size, usually microscopic. They have a very simple structure: they have no organs or tissues.
3. They are eukaryotic organisms. They can be unicellular or multicellular. Unicellular algae are microscopic in size, while whereas multicellular can be several meters long. The vast majority floats on water and are part of the plankton. Nutrition: Autotrophic organisms. Interaction: Free-living organisms that sometimes form colonies. Reproduction: Can be asexual by bipartition in unicellular organisms or by fragmentation in multicellular organisms, but it can also be sexual.
4. Unicellular algae: They can live free, like Euglena, or associate forming form colonies, like Volvox. Multicellular algae: They are classified by the pigments they have to make use for photosynthesis. Green algae or chlorophytes: The pigment is chlorophyll. Almost all are found in freshwater areas, although there are some marine algae. Brown algae or pheophytes: The pigment is fucoxanthin. They form marine forests in the oceans of temperate and arctic areas. Red algae or rhodophytes : The main pigment is phycoerythrin. They inhabit marine ecosystems located in tropical regions.
5. They are eukaryotic organisms. All of them are unicellular. All of them are microscopic in size. (saying small, large, microscopic, etc. always implies it is a type of size) They move using cilia, flagella or pseudopods. Others Some are sessile. Nutrition: They are heterotrophic organisms. (similarly, heterotrophic is already a descriptor of an organism) Interaction: Most are free-living, although there are some parasites though some are parasitic. Reproduction: It is usually asexual by bipartition. They are classified as flagellated, ciliated, rhizopods and or sporozoans.
6. Flagellated: They have one or more flagella to move around, and they can be parasites parasitic or free-living. An example of a flagellated is Trypanosoma. Ciliated: They have cilia with which they can move and they can be parasites parasitic or free-living. An example of a ciliated is Paramecium. Rhizopods: They move through pseudopods and can be parasites or free-living. An example of a rhizopod is Amoeba. Sporozoans: They have no structures for moving around movement and are parasites. An example of a sporozoan is Plasmodium.
7. Algae are part of the phytoplankton, which is the set of producing photosynthetic organisms in aquatic ecosystems. Certain species of algae have a high culinary value and are used in human food, especially in oriental cuisine. Agar, a substance used as a culture support for cultures in microbiology, but also in the preparation of medicines, perfumes or and certain foods such as soups and ice cream, comes from the cell wall of some algae. (You can say ‘ a substance used for cultures in microbiology’ but I removed it to help the sentence flow better) Many protozoa have an important role in the decomposition of organic matter present in very humid soils or stagnant waters. Parasitic protozoa can seriously damage the health of the humans being. This It is the case of for dysentery, malaria or and sleeping sickness.