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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 amoeba captures food with the help of cilia?

No, amoebas capture food by surrounding it with their cell membrane and forming a food vacuole. Cilia are small, hair-like structures that are used for movement and sometimes for feeding in other microorganisms.

Are protists more closely related to animals or to bacteria?

Protists are different from any other organisms found in the animal or bacteria kingdom. For this reason, they are seen as heterotrophic or autotrophic by biologists and botanists.

In the paramecium what pumps water out of the cell?

active transport, the water is pushed out through contractile vacuoles against its natural flow. Osmosis states that water flows from a higher concentration to a lower concentration, but the paramecium has less water and water is still being pushed out.

Which orgnisms demonstrates locomotion amoeba or elodea?

Amoeba demonstrates locomotion by crawling and changing shape using pseudopods, while Elodea does not demonstrate locomotion as it is a stationary aquatic plant.

Does NOT occur as a diatomic molecule?

Neon does not occur as a diatomic molecule. Its atoms exist as single atoms due to their stability and lack of a need to form covalent bonds with another atom to achieve a full valence electron shell.

Is paramecium pathogenic?

yes and no. they are pathogenic because they harm and they arent pathogenic because they dont always harm and instead sometimes provide benefit to the host

What are examples of Bacillariophyta?

Some examples of Bacillariophyta, commonly known as diatoms, include Navicula, Cyclotella, and Thalassiosira. These microscopic algae are characterized by their glass-like silica cell walls and diverse shapes, making them important primary producers in aquatic ecosystems.

Do Protists help or hurt the inside of the animal they live in?

Protists can have both positive and negative effects on the animal they live in. Some protists can form mutualistic relationships with animals, providing benefits like aiding in digestion or protecting against pathogens. However, other protists can be parasitic and harm the animal by causing infections or diseases.

What type of protists produces a test?

Diatoms and foraminifera are types of protists that produce tests, which are hard outer coverings that protect the organism.

Are protists monophyletic polyphyletic or paraphyletic?

Protists are a paraphyletic group because animals, fungi, and plants are the crown groups evolved from different lineages of the protists. They aren't included in the same group as protists taxonomically. This explains why the cladists consider the protist a paraphyletic group.

When an amoeba reproduces the parent cell ceases to exist?

That's false. The parent continues on with a small part of itself pinched off and developing independently as the "offspring". The "parent" amoeba can reproduce repeatedly just like most organisms.

What method of movement does the hydrodictyon algae use?

The hydrodictyon algae uses floating to move. It relies on water currents to help carry it to new locations.

What water regulation adaptations might have evolved in protists hypertonic habitats such as great salt lake. In habitats with changing salt concentration?

Protists in hypertonic habitats like the Great Salt Lake may have evolved adaptations like efficient ion pumps to regulate salt concentration within their cells. They may also possess specialized proteins or osmolytes to help maintain water balance by osmoregulation. In environments with changing salt concentrations, protists may have evolved the ability to adjust their osmoregulatory mechanisms dynamically to cope with fluctuations in their surroundings.

How do amoebas change shape?

By extending a portion of their cytoskeleton into a portion of their plasma membrane. This is called a pseudopodia and can be used as an anchor so that the amoeba can pull itself along behind these '' false feet. ''

The smallest bacterium is 0.2 micrometers across while the giant amoeba chaos chaos is 1000 micrometers across how many times larger is te giant amoeba than the smallest bacterium?

The giant amoeba is 5000 times larger than the smallest bacterium. This is calculated by dividing the size of the giant amoeba (1000 micrometers) by the size of the smallest bacterium (0.2 micrometers).

What is the main form of nutrition for diatoms?

The main form of nutrition for diatoms is photosynthesis, where they use sunlight to convert carbon dioxide and nutrients into organic matter. Diatoms are autotrophic organisms, meaning they can produce their own food using light energy.

What are the useful effects of amoeba?

Amoeba play a crucial role in the ecosystem by helping to decompose organic matter and recycle nutrients. They also serve as a food source for many organisms and help to regulate populations of other organisms in aquatic environments. Additionally, some species of amoeba are used in research to study processes such as cell movement and phagocytosis.

What is the structure of motility in amoeba?

Amoebas move using pseudopods, which are temporary extensions of their cytoplasm that help them crawl and engulf food particles. The process involves the coordinated action of microtubules and actin filaments to push and pull the cell in the desired direction. Amoebas can change the shape and position of their pseudopods quickly, allowing for rapid and flexible movement.

An algal bloom of dinoflagellates that causes fish kills is called?

A harmful algal bloom (HAB) caused by dinoflagellates that leads to fish kills is commonly referred to as a red tide. Dinoflagellates produce toxins that can affect marine life, including fish, by disrupting their nervous system and causing respiratory distress, ultimately leading to fish kills. Monitoring and managing red tides are essential to protect marine ecosystems and public health.

Network of ducts and reservoirs that allow paramecium to equalize water pressure through the cell membrane?

The contractile vacuole system functions as a network of ducts and reservoirs within a paramecium to regulate water balance and remove excess water from the cell. The system helps the paramecium maintain osmotic equilibrium by actively pumping out water that enters the cell through osmosis, preventing it from bursting due to excessive water intake. This allows the paramecium to survive in various aquatic environments with fluctuating osmotic conditions.

Are amoebas lower multicellular organism?

Amoebas are not considered multicellular organisms. They are single-celled organisms classified as protists. Multicellular organisms are made up of multiple cells that are specialized to perform specific functions, while amoebas are unicellular and can carry out all necessary functions within a single cell.

Algae can survive on the seafloor only in what?

Algae can survive on the seafloor only in shallow waters where there is enough light for photosynthesis to occur. Deeper in the ocean, there is insufficient light for algae to thrive.

In an amoeba a small cavity within the cytoplasm that stores food is called what?

The small cavity within the cytoplasm of an amoeba that stores food is called a food vacuole. This structure helps the amoeba digest and break down food particles for energy.

A heterotrophic protist with cell walls that uses spores to reproduce?

funguslike is the answer and heres some facts about it Neither plants nor animals, the fungi kingdom includes toadstools, puffballs, and MOLDS. Fungi feed on living or dead organisms by making them rot. Fungi are visible only when spore-bearing fruiting bodies form.

HOW DO FUNGI FEED?

Fungi absorb nutrients from plant or animal matter around them, which may be living or dead. They produce long, slender threads called hyphae that spread through their food. The hyphae release enzymes that break down the food into substances that the fungi can easily absorb.

HOW DO FUNGI REPRODUCE?

Most fungi reproduce by releasing tiny spores that then germinate (sprout) and grow into a new fungus. The spores are produced by, and released from, a fruiting body that is visible above the ground. Some fungi drop spores, which are blown away by the wind. Others shoot them out in an explosive burst.

ARE MUSHROOMS AND TOADSTOOLS THE SAME?

Toadstools are brightly colored and poisonous to eat, but mushrooms are usually edible and dull in color. Both toadstools and mushrooms are fruiting bodies (spore-bearing structures) produced by fungi. They belong to the same group, the Basidiomycetes, so scientists make no distinction between the two.

What is the most deadly protist called?

The most deadly protist is Plasmodium falciparum, which causes malaria in humans. It is responsible for the majority of malaria-related deaths worldwide.