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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 the modern name of amoeba cells called?

The modern name of the cell amoeba is mycoplasma bacterium

What is a paramecium's food intake?

Paramecium are unicellular, so they do not have multiple cells to compose an organ. However, most paramecium engulf the food by wrapping itself around it and bringing it inside the cell, using enzymes to break the food down and absorb the nutrients. The waste is excreted by pushing it out of the cell and into the environment.

How do plasmodium cells move?

Plasmodium cells move within the human body by infecting red blood cells and using them as a mode of transport to move through the bloodstream. Once inside a red blood cell, Plasmodium cells can change shape and move within the cell to evade immune responses.

Spyrogyra is algae and bacteria or protozoan?

Spyrogyra is a type of filamentous green algae. It is not a bacterium or a protozoan.

Where does waste exit the paramecium?

Waste exits the paramecium through a structure called the anal pore, located at the posterior end of the cell. This pore allows for the expulsion of unwanted materials and maintains the cell's internal environment.

What is the family of amoeba?

Amoebas belong to the family Amoebidae within the phylum Amoebozoa. This family includes various species of amoebas that are characterized by their shape-shifting abilities and lack of a fixed form.

What is the slowest protist?

The amoeba is the slowest protist because it's only way of moving is the shift it's cytoplasm into the pseudopods, which take a long time.

If a colony of bacteria were to give rise to an amoeba what would this be an example of?

This would be an example of transformation through evolution. Over time, genetic mutations and natural selection can lead to new species arising from common ancestors. In this case, the amoeba would have evolved from the bacteria through a series of genetic changes.

How does the amoeba obtain energy?

An amoeba gets energy in the same way that you do - from its food.

An amoeba feeds by sending out 'bulges' of its cytoplasm, called pseudopodia, to surround a small food particle eg a smaller protozoan or an alga. The food, together with a small drop of the water is taken into the cell to become a food vacuole. Enzymes are then added to the food vacuole to digest the food. The soluble products of digestion are taken into the cytoplasm and used for respiration or growth.

The release of energy from food is called respiration. Usually, the sugar called glucose is used by cells

Under what conditions does a paramecium discharge its trichocysts?

A paramecium discharges its trichocysts when it perceives a threat or disturbance in its environment. This response is meant to deter predators or capture prey by releasing harpoon-like structures from its cell membrane.

Why is conjugation a type of sexual reproduction?

Conjugate is a generic term for two things joining together for a purpose.

In biology conjugation occurs when two bacteria or cells come together temporarily to exchange genetic material. The word is also used in chemistry to indicate two materials being combined so that the newly created combined material is easier to identify or isolate.

With animals and people, it also means joining together to exchange genetic material, which is another was to say sexual reproduction.

Are amoeba plant like?

No, amoebas are not plants. They are single-celled organisms belonging to the group Protists. Amoebas are known for their ability to move and feed by extending their cell membrane in a process called phagocytosis.

How does a protista reproduce?

Protists can reproduce sexually or asexually, depending on the species. Asexual reproduction methods include binary fission, multiple fission, and budding. Sexual reproduction typically involves the fusion of gametes from two different individuals.

Can amoeba reproduce by fragmentation?

Yes, amoebas can reproduce by fragmentation. During fragmentation, the amoeba divides into two or more parts, each of which develops into a new individual.

What gives shape to the paramecium and euglena?

Paramecium has a rigid outer covering called a pellicle that gives it its shape, while euglena's shape is maintained by a proteinaceous structure called the pellicle and supported by protein strips called microtubules underneath the cell membrane.

What phylum does diatom belong to?

The more than 8,000 species of diatoms are the largest group in the phylum Chrysophyta of the kingdom Protista.

Do diatoms have a nucleus?

Yes they do. It is beneath the Si frustule and used in diatom defence against copepods. Check out Pohnert and Ianora's work on aldehyde production from polyunsaturated fatty acids in the lipid cell membrane.

What are dinoflagellates method of movement?

They have two flagellum one longer than the other. The larger moves in a whip like manner and propels the organism forward and the other flagellum acts as a rudder to steer the organism in the direction it wishes to travel.

Very small bottle shaped structure on a paramecium used for defense?

Trichocyst is a very small bottle-shaped structure found in paramecia that is used for defense. When a paramecium senses a threat, it discharges the trichocysts to release long, sharp structures that can deter predators or capture prey.

Do humans have amoebas?

There are several varieties found in humans that are not considered to be disease producers. However, such virulent strains as Entamoeba coli and Entamoeba hartmanni, can produce mild diarrhea and dysentery. Most amoeba infestations, however, do not produce clinical symptoms.

What is an amoebas purpose in life?

While amoebas are only single celled protozoa, some types are beneficial to their enviorment while others can be quite harmful. Amoebas can be found in both fresh and salt water, soil, and as parasites in animals. The most common amoebas, like the ones you usually see in science lab in schools, feed on decaying matter at the bottom of streams. The amoebas that are parasites can be quite dangerous to humans and animals, causing severe infections.



Read more: http://greenanswers.com/q/138820/nature-ecosystems/what-purpose-do-amoebas-serve-environment#ixzz14ApMcGnp

What is the importance of diatom and dinoflagellate?

Diatoms are very important in both freshwater and marine ecosystems. They export excess carbon in the ocean and also utilize silic acid to create their cells walls. The use of this also helps them be controlled vicariously through the abundance and dispersal of it throughout the water.

Diatoms are also able to sink, so that helps them with dispersal.

They are responsible for nearly half of the ocean's energy production.

What protist has 2 nuclei?

The protist that has two nuclei is Paramecium. It has a large macronucleus involved in regulating cellular functions and a smaller micronucleus involved in sexual reproduction.