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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
What is unique about dinoflagellates?
Dinoflagellates are unique because they are a type of microscopic algae that possess two flagella for movement and have a cell wall made of cellulose plates. They also play a crucial role in marine ecosystems as both primary producers and symbiotic partners with coral reefs. Additionally, some dinoflagellates are capable of bioluminescence, creating the phenomenon known as "sea sparkle" or "red tide."
What is the function of micronucleus?
Micronuclei are small nuclei found in some cells, typically formed during cell division. They are important for maintaining genetic material integrity, and their presence can indicate DNA damage or chromosomal instability in a cell. Micronuclei are often used as a biomarker for genotoxicity in cells exposed to harmful substances or radiation.
Euglena is a protist with characteristics of both plants and animals. It can photosynthesize like plants using chloroplasts, but can also ingest food like animals using a primitive mouth structure called a stigma. Additionally, Euglena has a flagellum for movement.
What controls the water content in an amoeba?
In an amoeba, the water content is controlled by the contractile vacuole. It fills with water (entering the amoeba by osmosis) and then empites the water once it reaches a certain level. If water was not displaced by the contractile vacuole, then the amoeba would burst.
No, paramecium do not have a nervous system or pain receptors, so they do not experience pain like animals with more complex nervous systems. They respond to stimuli in their environment to survive and reproduce.
Where did diatoms orginate from?
Diatoms are believed to have originated during the Jurassic period, around 250 million years ago. They are a type of algae that adapted to live in both freshwater and marine environments, and have since become one of the most diverse and abundant types of phytoplankton in the world.
Dinoflagellates are members of what phylum?
Mst live in salt water. May be deadly if eaten. It is a poisonous puff fish that if not cut correctly and is eaten it is poisonous and shuts down everything even the brain. Most do not feed on chlorophyll, but must eat other organisms to survive.
Dinoflagellates are single-celled organisms with two flagella, occurring in large numbers in marine plankton and also found in fresh water. Some produce toxins that can accumulate in shellfish, resulting in poisoning when eaten.
When the fire algae is in a large goroup it makes a toxin that makes the water a redish color, calleed Redtide.If so dont swim in it or fish or drik it. It could cause death.
plantlike protist that has two flagella and armorlike cell walls.
How does the Diatoms reproduce?
A Didinium is a protist that feeds by ingesting bacteria (bacteriovorus) through a mouth-like opening at the anterior end of the cell. The cell has an equatorial gridle of cilia, with a second gridle surrounding the anterior end. Cilia may assist in sweeping bacteria toward opening.
How do paramecium respond to their environment?
Upon encountering a stimulus, paramedium with move quickly backwards, change direction slightly and move forwards again, repeating this until it passes the obstacle. Paramecium have different reactions for different stimuli, for example, they move towards slight acidity and warmth in water but will swim away from extremes in temperature and acidity.
What kingdom are algae classified under?
Algae are classified under the kingdom Protista, which is a diverse group of eukaryotic organisms that do not fit into the plant, animal, or fungal kingdoms. Algae are primarily photosynthetic organisms that can be unicellular or multicellular.
What are interesting facts about amoebas?
- To prevent cannibalism, it releases a chemical which keeps other Amoebas away. This can also keep away predators.
- When Amoeba consumes prey, the things it consumes stay alive for some while.
- They have no fixed body shape.
- Most have no hard parts and look like blobs of jelly. However, some do grow "shells".
- They have no stomach . Digestion takes place in the Vacuole.
- It moves by constantly changing its body shape.
- To reproduce, it divides itself into two.
How do protist maintain homeostasis?
Must live in moist environment
• adjust to moisture level-contractile
vacuoles pump out water, for example
• Produce spores to keep from drying out
under less-than-ideal conditions
Yes, Paramecium is a type of single-celled protist. It belongs to the phylum Ciliophora and is characterized by its cilia-covered surface and ability to move using these hair-like structures.
No, paramecium is not a parasite. It is a single-celled organism belonging to the phylum Ciliophora, commonly found in freshwater environments. Paramecia are free-living organisms that feed on bacteria and other small particles.
No, amoebas do not have backbones. They are single-celled organisms that lack complex structures like skeletons or backbones.
Describe how the Amoeba uses it pseudopodia?
Pseudopods are flowing extensions of the amoeba's cytoplasm, which the amoeba use to move around. They do this by stick a part of their cytoplasm outward to an open area, then the part will pull the rest of the amoeba toward it.
What college has a dinoflagellate as a mascot?
The University of North Carolina at Wilmington has a Seahawk as its mascot which is a type of dinoflagellate.
How do large food particles enter the amoeba?
The amoeba uses phagocytosis (it surrounds it and brings it into a vesicle).
What is meaning of diatoms flux calcined?
Diatomite
Diatomite or diatomaceous earth is a sediment greatly enriched in biogenic silica in the form of siliceous skeleta of diatoms, a diverse array of microscopic, single-cell algae. These frustules are sufficiently durable to retain much of their structure through long periods of geologic time and through thermal processing. Diatomite products have an inherently intricate and highly porous structure composed primarily of silica.
Flux Calcination
Calcination in the presence of a fluxing agent. In general, the presence of a flux during calcination reduces the temperature at which sintering and agglomeration of diatomite particles occurs, thus permitting larger agglomerates to form and extending the permeability range of filter aids. A common fluxing agent is sodium carbonate (Na2CO3).
Protists are a diverse group of single-celled organisms that play important roles in various ecosystems. They can act as decomposers, predators, producers, and can also serve as food sources for other organisms. Some protists are responsible for producing a significant portion of the Earth's oxygen through photosynthesis.
In Gause's expirements with paramecium growing in test tubes he demonstrated what?
Gause's experiments with Paramecium in test tubes demonstrated competitive exclusion principle, showing that two species competing for the same limited resources cannot coexist indefinitely in a stable environment. This led to the concept of niche differentiation, where species evolve to occupy different ecological niches to reduce competition and coexist.
Various marine organisms eat dinoflagellates, including zooplankton, small fish, mollusks, and some species of whales. Some microscopic predators like ciliates and amoebas also feed on dinoflagellates. Additionally, some herbivorous marine animals, such as certain sea slugs and copepods, consume dinoflagellates as part of their diet.
