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Protists
Protists are unicellular or multicellular microorganisms. The majority of protists are responsible for many diseases in humans.
1,262 Questions
Is a leaflet in the Protista kingdom?
No, leaflets are not part of the Protista kingdom. The kingdom Protista includes diverse single-celled and multicellular organisms, such as algae and protozoans, but not plant structures like leaflets. Leaflets are specialized structures found in the plant kingdom that are part of compound leaves.
No, amoebas are not metazoans. Metazoans refer to multicellular organisms with differentiated tissues and organs, while amoebas are single-celled protists that lack these specialized structures.
What group of protists can glow in the dark or cause toxic red tides-?
Dinoflagellates are a group of protists that can glow in the dark, a phenomenon known as bioluminescence. Some dinoflagellates also produce toxins that can cause harmful algal blooms, known as red tides, which can be toxic to marine life and humans when ingested.
What types of algae are the major constituents of phytoplankton?
The major types of algae in phytoplankton include diatoms, dinoflagellates, cyanobacteria (blue-green algae), and coccolithophores. These algae play a vital role in marine ecosystems and contribute significantly to global primary production and nutrient cycling.
A sporangium is a structure in plants and fungi that produces and contains spores. Spores are reproductive cells that can develop into new organisms. The release of spores from sporangia allows for dispersal and reproduction in these organisms.
How do protists maintain water balance?
Protists maintain water balance through osmoregulation, which involves controlling the movement of water and ions across their cell membranes. They use contractile vacuoles to regulate water content by expelling excess water that enters the cell through osmosis. Additionally, some protists have adapted to specific environments by evolving structures or behaviors that help them avoid dehydration or over-hydration.
How are an amoeba cell and a human being cell similar?
Both amoeba and human cells are eukaryotic, meaning they contain a nucleus and organelles enclosed within a membrane. They also both carry out essential life functions such as metabolism, growth, and reproduction. Additionally, they both contain genetic material in the form of DNA that dictates their structure and function.
What are two reasons why aquatic algae are important?
Aquatic algae are important because they are the base of the aquatic food chain, providing food for a variety of organisms. They also play a key role in the oxygen production and carbon dioxide uptake in aquatic environments through photosynthesis.
There is no known medical condition or term called "gameolitofytosis." It may be a made-up or misspelled term. If you have any other questions or concerns, feel free to ask.
Does Physarum polycephalum have a symbiotic relationship?
Physarum polycephalum is a type of slime mold that does not typically form symbiotic relationships with other organisms. It is a type of protist that feeds on decaying organic matter and does not rely on other organisms for its survival.
What protista has Glass or silica in shells?
Diatoms are a type of protist that have glass or silica in their shells. These microscopic organisms are known for their intricate and beautiful glass-like structures, which provide protection and help with buoyancy in water.
What elements aren't diatomic?
The elements that are not diatomic in their standard state are: helium, neon, argon, krypton, xenon, and radon. These elements exist as individual atoms rather than diatomic molecules because they have a full valence shell and do not need to form bonds with another atom to achieve stability.
The main predator of algae is zooplankton, which are small aquatic organisms that feed on algae to obtain nutrients. Larger organisms such as fish and some invertebrates also consume algae as part of their diet.
What is the main problem with classifying protists?
Historical classifications
The first division of the protists from other organisms came in the 1830s, when the German biologist Georg August Goldfuss introduced the word protozoa to refer to organisms such as ciliates and corals.[4] This group was expanded in 1845 to include all "unicellular animals", such as Foraminifera and amoebae. The formal taxonomic category Protoctista was first proposed in the early 1860s by John Hogg, who argued that the protists should include what he saw as primitive unicellular forms of both plants and animals. He defined the Protoctista as a "fourth kingdom of nature", in addition to the then-traditional kingdoms of plants, animals and minerals.[4] The kingdom of minerals was later removed from taxonomy by Ernst Haeckel, leaving plants, animals, and the protists as a "kingdom of primitive forms".[5]
Herbert Copeland resurrected Hogg's label almost a century later, arguing that "Protoctista" literally meant "first established beings", Copeland complained that Haeckel's term protista included anucleated microbes such as bacteria. Copeland's use of the term protoctista did not. In contrast, Copeland's term included nucleated eukaryotes such as diatoms, green algae and fungi.[6] This classification was the basis for Whittaker's later definition of Fungi, Animalia, Plantae and Protista as the four kingdoms of life.[7] The kingdom Protista was later modified to separate prokaryotes into the separate kingdom of Monera, leaving the protists as a group of eukaryotic microorganisms.[8] These five kingdoms remained the accepted classification until the development of molecular phylogenetics in the late 20th century, when it became apparent that neither protists nor monera were single groups of related organisms (they were not monophyletic groups).[9]
Modern classificationsCurrently, the term protist is used to refer to unicellular eukaryotes that either exist as independent cells, or if they occur in colonies, do not show differentiation into tissues.[10] The term protozoa is used to refer to heterotrophic species of protists that do not form filaments. These terms are not used in current taxonomy, and are retained only as convenient ways to refer to these organisms.The taxonomy of protists is still changing. Newer classifications attempt to present monophyletic groups based on ultrastructure, biochemistry, and genetics. Because the protists as a whole are paraphyletic, such systems often split up or abandon the kingdom, instead treating the protist groups as separate lines of eukaryotes. The recent scheme by Adl et al. (2005)[10] is an example that does not bother with formal ranks (phylum, class, etc.) and instead lists organisms in hierarchical lists. This is intended to make the classification more stable in the long term and easier to update. Some of the main groups of protists, which may be treated as phyla, are listed in the taxobox at right.[11] Many are thought to be monophyletic, though there is still uncertainty. For instance, the excavates are probably not monophyletic and the chromalveolates are probably only monophyletic if the haptophytes and cryptomonads are excluded.
What is the difference between an amoeba and a hydra?
Amoebas are single-celled organisms that move by extending their cell membrane called pseudopods, while hydras are multicellular organisms that belong to the phylum Cnidaria and have tentacles around their mouths for feeding. Amoebas lack specialized tissues and organs, while hydras have a simple body structure with a basic nervous system, digestive system, and reproductive organs.
Why protista is consider rag bag of living organisms?
Protists are considered a rag bag of living organisms because they are a diverse group of eukaryotic organisms that do not fit neatly into other major classification groups like plants, animals, or fungi. They exhibit a wide range of characteristics and lifestyles, making them a varied and eclectic group.
How amoeba takes up food describe process with diagram?
The mode of nutrition in amoeba is holozoic. The process of obtaining food is called phagocytosis. Amoeba feeds on microscopic organisms floating on water. The nutrition involves processes like ingestion, digestion, assimilation and egestion.
Process : Amoeba forms pseudopodia to take food. When the tips of
What household items contain diatom?
Diatomaceous earth (diatom) can be found in various household items such as insecticides, toothpaste, water filters, and absorbent materials. It is commonly used for its abrasive and absorbent properties in these products.
What kind of algae is in ramen noodles?
The algae used in making ramen noodles is called konbu, or kombu. It is a type of edible kelp that is commonly used in Japanese cuisine to add flavor and nutrients to broths and soups. Konbu is rich in vitamins and minerals, making it a healthy addition to the diet.
Which structure of a diatom is rich in silicon?
The cell wall of a diatom is rich in silicon. It is composed of two overlapping halves, like a petri dish, made of silica that give diatoms their unique intricate patterns and shapes.
Trypanosomes are a type of parasitic protozoa that can cause diseases in humans and animals, such as sleeping sickness in humans and nagana in animals. They are transmitted to their hosts through the bite of infected tsetse flies. Trypanosomes have a unique characteristic of being able to evade the host's immune system by changing their surface proteins.
How may elements does a diatomic molecules have?
we can identify the element having diatomic by finding out the valency of that element.
i think it helps you.
What is one fun fact about protists?
One actual fun fact is that they can conume other organisms for their nutrients, so that means that you are an organism, so that they can consume you! Joking, but they do consum organisms for their nutrients.
Is the Kingdom Protista still used?
The classification of Kingdom Protista is no longer used in modern biological classifications. Organisms that were once classified under Kingdom Protista are now distributed into various other kingdoms based on their evolutionary relationships, such as Kingdoms Plantae, Animalia, Fungi, and others.
Does plasmodium falciparum have flagella?
No, Plasmodium falciparum, the parasite that causes malaria, does not have flagella. It has a specialized organelle called the apical complex, which helps it invade host cells.
