A description of protozoa which is a collective name for animal like single celled organisms
Most species also bear toxicysts that are most likely used to capture and stun prey. In: Encyclopedia of Earth. The Amoeba moves by extending part of its cell. For example, molecular data confirms that the apicomplexa are monophyletic, and furthermore, indicates that they are related to the ciliates and dinoflagellates.
Classification of protozoa pdf
Ciliates have toxicysts that they fire at their prey to subdue it. Of the protozoans that have both animal and plant characteristics, most are flagellates - there are entire subgroups of flagellates that are considered algae. They move with the help of microscopic hair-like structures called cilia, which act like oars to push them through the water. There are several forms of flagellates that can invade humans and produce disease: Giardia is a teardrop-shaped cell that has two nuclei beneath a bit of a cup-shaped depression and eight flagella - under a microscope it looks a bit like a cross-eyed short-handled racket. The first character is the presence of cilia on at least one developmental stage of the organism. This is attributed to the large number of mutations that accumulate during long bouts of asexual reproduction. Sessile or colony-forming members of the collared flagellates use their flagella to create a water current to draw small food particles, such as water-borne bacteria.
Sessile or colony-forming members of the collared flagellates use their flagella to create a water current to draw small food particles, such as water-borne bacteria. Cilia help the Paramecium move as well as feed.
All protists had animal-like characteristics in terms of their movements and feeding patterns. In ciliates and Apicomplexathe pellicle is supported by closely packed vesicles called alveoli.
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