There are also parasitic protozoa that live in or on living hosts. For example, the protozoan that causes malaria lives inside a human host.
Protozoa are also important food sources for many larger organisms, including insectsand worms. Protozoa can be classified on the basis of how they move. As shown in Table below , protozoa move in three different ways. Only sporozoa cannot move. Note that this classification is based only on differences in movement.
It does not represent phylogenetic relationships. What's like an animal, but not an animal? Animal-Like Protists: Protozoa Animal-like protists are commonly called protozoa singular, protozoan. Ecology of Protozoa Protozoa generally feed by engulfing and digesting other organisms.
Classification of Protozoa Protozoa can be classified on the basis of how they move. Sporozoans are parasitic -- they live on, or in, a host body and cause it harm. Lacking cilia, flagella or pseudopodia, sporazoa depend on their host organism for nourishment and on vectors, such as mosquitoes, to carry them there. They pass from host to host, or vector to host, as spores.
Reproduction has both sexual and asexual stages. What Is a Tetrad in Microbiology? General Characteristics of Protista. Is Algae a Decomposer, a Scavenger or a Producer? What is a Unicellular Eukaryote? The Anatomy of the Hydra. What Types of Fungi Grow in the Ocean?
What Types of Cells Are Bacteria? Organelles Involved in Photosynthesis. How Do Bacteria Feed? Earthworm Phylum Characteristics. They are highly structured.
They have contractile vacuoles to get rid of excess water. They use flagella to move. Some of them live in water. Others are parasites that can cause disease.
These flagellate parasites are called Giardia lamblias. It lives in the digestive tracts of humans. If hikers drink water that is infected with this they can get diarrhea and severe stomach cramps. These are the most complex protozoa. They have hundreds of tiny hairlike structures known as cilia. Cilia can beat up to 60 times a second.
0コメント