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Protozoa

Protozoans are unicellular organisms found in many different habitats. They are eukaryotic and can be predators, herbivores or parasites, depending upon the species. The well-known disease malaria is caused by a protozoa.

1,445 Questions

Do paramecium live in colonies?

Paramecium are single-celled organisms that typically live independently rather than in colonies. They are part of the phylum Ciliophora and are characterized by their cilia, which they use for movement and feeding. While they may gather in groups in favorable environments, they do not exhibit true colonial behavior like some other microorganisms.

How does chlamydomonas eat food?

Oh, dude, Chlamydomonas is like this chill algae that just soaks up nutrients from its surroundings. It uses its flagella to move around and find tasty morsels, then engulfs them in a process called phagocytosis. So, basically, it's like the algae version of ordering takeout.

What is the difference between euglena and bacteria?

Euglena is a unicellular organism belonging to the kingdom Protista, characterized by a flexible outer covering called a pellicle and a flagellum for movement. It contains chlorophyll and can perform photosynthesis. Bacteria, on the other hand, are prokaryotic organisms belonging to the kingdom Monera, lacking a membrane-bound nucleus and organelles. They have a cell wall and reproduce asexually through binary fission.

Is the amoebas helpful or harmful to humans?

Can be both harmful and helpful. They can be harmful to humans because, many types of amoebas can carry diseases, and some can feed on human tissue. They can get into our body by, contaminated food and contaminated water. Amoebas are also helpful because they are part of the food chain.

What is the scientific name of volvox?

The scientific name of Volvox is Volvox carteri. Volvox is a genus of green algae that forms spherical colonies. Each colony is made up of numerous individual cells that work together in a coordinated manner, exhibiting characteristics of both multicellular and unicellular organisms.

What feeding level is an amoeba on?

An amoeba is a primary consumer, also known as a herbivore or a heterotroph. As a single-celled organism, it feeds on smaller organisms such as bacteria, algae, and other microscopic organisms through a process called phagocytosis. This feeding level places the amoeba at the second trophic level in a food chain or food web.

Is paramecium a lining organism or not?

Paramecium is not a parasitic organism. It is a free-living, single-celled protist that can be found in various aquatic environments. It feeds on bacteria and smaller organisms by using cilia to sweep them into its oral groove.

Are protozoa multicellular colony dwellers?

No, protozoa are single-celled organisms that exist independently as individuals rather than forming multicellular colonies. They are part of the protist kingdom and exhibit a diverse range of structures and behaviors as single-celled organisms.

What has a nervous system but no brain 1 earthworm 2 hydra 3 cockroach 4 amoeba?

  1. Earthworms and cockroaches have nervous systems but no brain.
  2. Hydras have a nervous system consisting of a nerve net but lack a centralized brain.
  3. Amoebas do not have a nervous system or a brain.

What is entamoeba?

Entamoeba is a genus of single-celled parasites that can infect the human digestive system, causing diseases such as amoebiasis. The most common species that affects humans is Entamoeba histolytica. Symptoms of infection may include diarrhea, stomach pain, and in severe cases, dysentery. Proper hygiene practices and using clean water sources can help prevent infection.

Where does amoeba obtain its food?

The amoeba in Figure 15 belongs to the group of protozoans called sarcodines. Sarcodines move and feed by forming pseudopods (soo duh pahdz)---temporary bulges of the cell. The word pseudopod means "false foot." Pseudopods form when cytoplasm flows toward one location and the rest of the organism follows. Pseudopods enable sarcodines to move. For example, amoebas use pseudopods to move away from bright light. Sarcodines also use pseudopods to trap food. The organism extends a pseudopod on each side of the food particle. The two pseudopods then join together, trapping the particle inside.

FROM SCIENCE EXPLORER 2009 LIFE SCIENCE BOOK

How are chlamydomonas isogamous?

Chlamydomonas is considered isogamous because it produces gametes that are morphologically similar in size and structure (flagellated and motile) during sexual reproduction. This means that the gametes produced by different mating types are indistinguishable from each other.

Is amoeba a type of protozoa?

Yes, amoeba is a type of protozoa. Protozoa are a diverse group of single-celled organisms that are classified based on their mode of movement, and amoebas are one of the groups within this classification. Amoebas are characterized by their blob-like shape and their ability to move and feed by extending their pseudopods.

Do protozoa have peptidoglycan?

Only prokaryotes are having cell wall. Cell wall is absent in case of eukaryotes, it is surrounded only by cell membrane. Peptidoglycan cell wall is present as thick layer in gram positive bacteria and it is present as a thin layer in gram negative.

How is a protozoan parasite different from bacteria?

Protozoan parasites are single-celled eukaryotic organisms, while bacteria are prokaryotes. Protozoan parasites are generally larger and have more complex cellular structures compared to bacteria. Additionally, protozoan parasites often have more specialized modes of transmission and lifecycle strategies that are adapted to living within a host organism.

What is asmoregulation?

Homeostasis is the ability to maintain internal stability and balance within an organism. It involves processes like regulating body temperature, pH levels, and fluid balance to ensure optimal function.

What is pseudo plasmodium?

Pseudoplasmodium is a collection of amoebae that have combined due to a loss of food source. This aggregated of amoebae forms a slug structure with a defined body that is motile and responds to light and temperature. Under specific conditions, this grex can 'sprout' out stalks that create spore like structures to form a protective cellular wall. These spores can turn into individual amoebae when a food supply is replenished.

What causes protozoan plasmids?

Protozoan plasmids are usually acquired through horizontal gene transfer, where they are passed between protozoan species. They can also arise through integration of foreign DNA into the protozoan genome or through recombination events within the protozoan population.

Why are protozoans eukaryotic?

They have an organized nucleus.So they are eukaryotic

What differences exist in the structure that provides an outer protective barrier for virus bacteria and protozoa?

The virus uses a capsid; a protein structure.

Bacteria use a peptidoglycan cell wall with one or two cell membranes.

Protazoa use different methods. Some have VSP or VSGs; proteins attached to their cell membranes that protect them. Some do not and only have a cell membrane.

What are paramylum bodies?

Paramylum bodies are specialized organelles found in certain algae cells that store starch. These structures help algae to store energy reserves in the form of carbohydrate polymers during periods of low nutrient availability.

What is contractile vacuole in amoeba related with?

The contractile vacuole in amoeba is related to osmoregulation, which is the process of regulating the water and ion balance within the cell. It helps to expel excess water and waste products to prevent the cell from swelling or bursting.

What is the significance of an eyespot in a euglena cell?

The eyespot in a Euglena cell is a light-sensitive organelle that helps the organism detect light intensity and direction, allowing it to move towards light for photosynthesis. It also helps in avoiding harmful levels of light that could damage the cell.