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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
Does an amoeba move by sending out projections of cytoplasm called pseudopods?
Yes, that is correct. Amoebas move by extending and retracting pseudopods, which are temporary projections of their cytoplasm. This allows them to change shape and move towards sources of food or away from harmful stimuli.
What two phyla contain multicellular organisms that are in kingdom Protista?
One is rhodophyta, which surprisingly includes kelps.
Another is chlorophyta, which is made of colonies of organisms.
This is the closest you could get to two phylums of multicellular organisms in kingdom Protista.
Algae typically occupy the primary producer trophic level in an ecosystem as they use photosynthesis to convert sunlight into energy. They form the base of the food chain, providing energy for organisms at higher trophic levels.
Which of amoeba and paramecium and euglena can survive the most adverse conditions?
Amoeba can survive the most adverse conditions due to its ability to form a protective cyst. This cyst helps amoeba withstand extreme temperatures, pH levels, and lack of nutrients until conditions become favorable again. Paramecium and Euglena do not have this cyst formation capability and are less resilient in adverse conditions.
What is the name for protists that can produce their own food?
Some protists are phototrophs ie they get energy via photosynthesis. . Energy from sunlight is used to convert carbon dioxide and water into organic materials to be used in cellular functions such as biosynthesis and respiration.
Examples are: Algae, Dinoflagellates or Euglena .
One of the best ways to prevent most parasitic diseases is to have a clean source of water, as parasites can live in water. This is why many third world countries have lots of outbreaks, compared to like the U.S., which is a developed country, with sources of fresh, clean water...by:maryjane of II-love :))
What is the habitat of a paramecium is?
Paramecium are free-living organisms found in various aquatic environments such as ponds, lakes, and slow-moving streams. They prefer habitats with plenty of organic matter for food, along with proper water salinity and pH levels. These single-celled organisms thrive in freshwater environments with an abundance of bacteria and algae for them to consume.
How would the movement of a live Paramecium compare to that of a live Amoeba?
paramecium use motile cells/hairs called cillia to swim as it were.ameboea use a form of locomotion.that is it heaves part of it self forward and pulls it self along.on amicroscopic scale this system of motion works in liquids.
Which protist has an oral groove?
The protist that has an oral groove is Paramecium. The oral groove is a structure found in Paramecium used for feeding and taking in food particles. This ciliated protist sweeps food particles into the oral groove, where they are engulfed and digested.
What criteria could you use to determine the most primitive protist?
The most "primitive" protist in the Kingdom Protista would be the more ancestral protists. One major group of protists called the Excavates (which include the Diplomonads and the Parabasalids) are considered by some scientists as the most "primitive" because it lacks a mitochondria while other protists have mitochondria.
No, amoebas are not anaerobes. They are able to survive in oxygen-rich environments and require oxygen for their metabolic activities. Anaerobes, on the other hand, do not require oxygen and can survive in oxygen-deprived environments.
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.
