flagellates
have flagella – Giardia and Leishmania; have trophozite and cyst stages
Flagellates are a diverse group of unicellular protists that possess one or more flagella, which are long, whip-like structures used for locomotion. They are found in a variety of environments, including freshwater, marine, and terrestrial habitats, and can be photosynthetic, heterotrophic or mixotrophic in nutrition.
There are several different types of flagellates, including dinoflagellates, euglenoids, and trypanosomes. Dinoflagellates are marine flagellates that are an important part of the phytoplankton community and can cause harmful algal blooms. Euglenoids are freshwater flagellates that can be photosynthetic or heterotrophic, and can switch between the two modes of nutrition depending on environmental conditions. Trypanosomes are parasitic flagellates that can cause diseases such as sleeping sickness in humans and animals.
Flagellates have a variety of shapes and sizes, and some have complex structures such as chloroplasts, pellicles, or contractile vacuoles. They play important roles in nutrient cycling, food webs, and as hosts or vectors for pathogens. The study of flagellates is an important area of research in the fields of ecology, evolution, and medical science.
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