Single-celled, animal-like, eukaryotic organisms of the kingdom Protista. Protozoans can occur wherever moisture exists. There are many parasites and commensals of plants and animals, as well as free-living species. They cause a number of diseases, such as African sleeping sickness, malaria, and dysentery. They are an economically and scientifically important group. It is thought that the organisms of the kingdom Animalia evolved from ancestors which were protozoans.
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There are approximately 30,000 known species of protozoans.
The four Phyla of Protozoans are Sarcomastigophora, Apicomplexa, Ciliophora, and Microspora.
Protozoans are eukaryotic, single-celled organisms with complex cellular structures and can be parasitic or free-living, while bacteria are prokaryotic, single-celled organisms that are much smaller in size compared to protozoans and have simpler cellular structures. Additionally, some bacteria can cause diseases in humans and other organisms, whereas protozoans are generally not known to cause diseases.
The main excretory products of protozoans are primarily ammonia and other nitrogenous wastes, which are byproducts of protein metabolism. These organisms typically excrete these wastes through diffusion across their cell membranes into the surrounding water, as many protozoans live in aquatic environments. Some protozoans may also utilize specialized structures, such as contractile vacuoles, to help regulate and expel excess water and waste.
some harmful effects of protozoans is... i don't know you tell me please? :(
they get some food in the organisms known as hosts
yes some of them have. They are doing photosynthesis.
No, not all protozoans are prokaryotic and autotrophic. Protozoans are eukaryotic organisms that can be autotrophic or heterotrophic. Autotrophic protozoans can photosynthesize like plants, while heterotrophic protozoans rely on organic matter for nutrition.
protozoans are unicellular organisms
No Protozoans do not have skeleton. They are unicellular organisms.
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Malaria is produced by parasitic protozoans.
The study of protozoans is part of microbiology.
The fingerlike projections of cytoplasm used by some protozoans for movement and obtaining food are called pseudopodia. These structures help protozoans to extend their reach and capture food particles in their environment through a process known as phagocytosis.
Protozoans are heterotrophic, whereas algae are autotrophic.
Algae are autotrophs, while protozoans are heterotrophs.