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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
Plasmodium is not a bacteria to be classified whether gram negative or gram positive. It is a genus of parasitic protists. Infection by these organisms is known as malaria.
Why are some protists more closely related to other kingdoms than to members of their own kingdom?
Because they are more different than they are alike.
Is a paramecium a animal like protist or plant like protist?
Simply because it eats other organisms using a simple digestive system. And also Animal-like protist's move by cilia, Flagelum.
All Protozoa including Paramecium are included in Animal like Protista , because 1 they ingest food and then digest it , 2 they show locomotion , , 3 they are heterotrophic .
What are the three ways that animal-like protists move?
three ways protozoans move are cilia, pushing out part of their bodys called pseudopod, and flagella.
What group of protists can glow in the dark or cause toixc red tides?
Many glow in the dark; Euglenoids
To keep from bursting and dying what must a Paramecium do in a hypotonic environment?
A Paramecium has a plasma membrane that is much less permeable to water than other membranes of most cells. The Paramecium cell is also equipped with a contractile vacuole, an organelle that functions to force water out of the cell as fast as it enters by osmosis.
-AP Biology Student
What method of locomotion do paramecium use?
Paramecium uses cilia, which are like tiny hairs all around the organism, to pull itself through water. Sometimes, not all the cilia move in the same direction, so the cell spirals as it pulls itself through the water.
well first of all diatoms are not a species, they are an entire class of organisms with many different species under the umbrella term, "diatoms." And there will probably always be diatoms of some kind or another. If certain types are endangered, it would be pretty hard to notice as they are microscopic. And it would be near impossible to get anyone to care about an endangered microscopic single-celled organism. That's like asking someone to care about an endangered sewer bacteria or an endangered dirt fungus. At best it's like yeah who cares at worst it's like good effin riddance. But i think this is most likely a troll question anyway. (Don't you have studying to do?)
How does amoeba engulf solid food particles?
Amoebas use pseudopods, which are temporary extensions of their cell membrane, to surround and engulf solid food particles. Once the food particle is completely enclosed within the pseudopod, it forms a food vacuole where digestion takes place.
Why are some bosses difficult to deal with?
The bosses I've had that were difficult usually had one of two conditions to deal with that made them difficult. One was that they had reached a level of responsibility that was just beyond their capability to perform and they were worried that they would be found out. The second was when the boss felt they hadn't been recognized with the higher level of responsibility they deserved and they were bitter.
Diatoms themselves are not dangerous; they are a type of algae that play a crucial role in aquatic ecosystems and contribute to oxygen production. However, some diatoms can produce toxins that may be harmful to marine life and humans if ingested or if they bloom excessively, leading to harmful algal blooms. In general, diatoms are beneficial organisms, but their effects can vary depending on the species and environmental conditions.
A predator is animal that preys on another mainly as a food source. In nature many animals are predators or prey.
No, they feel vibrations with the hairs on their legs.....
and remember there more scared off you then your scared of them. spiders are very
venimis be carefull children you mite be bitten by one they are very stinky
Are diatoms heterotroph or autotroph?
autotrophic- meaning they produce there own food through photosynthesis
What are characteristics of diatoms?
Characteristics of diatoms:
- All species are unicellular or colonial coccoid algae. None are free-living flagellates.
- The only flagellate cells produced are the male gametes (= sperm, spermatozoids) of 'centric' diatoms. These have a single forward-pointing flagellum, which bears mastigonemes.
- The relative proportions of the chlorophylls and fucoxanthin produce a yellow-brown or greenish-brown colour in the plastids.
- Most have a large central vacuole or pair of vacuoles.
- Cells (especially during stationary-phase) often accumulate large quantities of lipids and fatty acids; polyphosphate bodies are also present and sometimes take the form of discrete spherical or complex 'volutin' granules, one per vacuole.
- Secretion of extracellular polymeric material (usually polysaccharides) is common, as stalks, pads, capsules, tubes, chitin fibres, or trail material from locomotion.
- All cells (except the gametes and endosymbiotic diatoms) possess a bipartite cell wall comprising two overlapping halves.
- Each half-wall itself consists of a large end-piece, the 'valve', and several or many narrow bands or segments, which together form the 'girdle'.
- The cell wall is almost always heavily silicified.
- Cell wall elements (valves, girdle bands, and auxospore scales and bands) are formed intracellularly, in special membrane-bound 'silica deposition vesicles' associated very closely with the cell membrane; they are not secreted from the cell until they are complete.
- New wall elements are always produced within the confines of an existing cell wall. As a result, average cell size usually decreases with successive mitotic divisions during the life cycle.
- Size is restored via the formation and expansion of a special cell, the auxospore, which is usually a zygote. The basic shape of each diatom species is largely created during the expansion of the auxospore, but is often modified during subsequent mitotic cell divisions.
- During vegetative mitoses, the nucleus always lies to one side of the cell immediately beneath the girdle, at the edge of the hypotheca.
- Mitosis is open, the nuclear envelope breaking down before metaphase; the spindle is a narrow cylinder, persistent at telophase, consisting of two interdigitating half-spindles, each associated with a polar plate.
- The chromosomes bunch closely around the cylindrical spindle at metaphase, becoming impossible to separate and count.
- Cytokinesis occurs through cleavage.
- The life cycle is strictly diplontic: as far as is known, all vegetative cells of all species are diploid, and all mitoses take place in the diploid phase. However, haploids have occasionally been grown in culture in a few species.
- They occur just about everywhere in aquatic and damp terrestrial habitats, providing that photosynthesis is possible.
- They are amazingly diverse, with hundreds of genera and perhaps 200,000 species.
(from tolweb.org)
It moves around within the Paramecium cell, distributing food, nutrients, and other needed materials to different parts of the cell.
What are two ways that protists can reproduce asexually?
Binary fission - single cell divides to produce two offspring
Multiple Fission - single cell divides to produce more than two offspring
List five characteristics of living things?
The 5 characteristics of all living things are:
- It must grow until it can reproduce.
- It must consume, transform and store energy. (food, air, etc...) It must grow by absorbing energy in its environ.
- It must move from the outside (walking, hunting, eating, etc. ...) and/or inside (blood circulation, digestion, etc. ...)
- It must be able to reproduce (to create entities similar to itself)
- It must be able to detect the properties of its environment and act appropriately.
