Question

1) Protozoa are a polyphyletic group .What does that term mean?What common characteristics do Protozoa have that facilitates informally grouping them together?There are four pathogenic groups, based on their method of motility.Briefly describe these groups, give an example of a common parasite within each group, the disease they cause and their reservoirs / source.

Answer 1

polyphyletica A group of organisms that include an an costar but not all its desendants in other words. Such groeps that are derived from more than One Common ancestor (or) ancestral group and hence it is not suitable to be placed in the Same taxon. the photo Zoan's are placed into Javious groups on the basis of their movement ) locomotion these groeps are generally called plyle ) Classes They are druided into four maps groups : nd > Amoeboid protozoan () Sarcoclines: > Flagellaced protozoan's ® Zooitlagellates. - Ciliated protozoan's 6 ) calistes → Sporozoans. * Amoe bos d pootozoan Cor) Sarcodines :- They found are in oni Cellutar i Jelly - like protozoa fresh (or) sea water and an most Soil. Scanned with CamScanner

- They lack periplast and also lack flagella and have preudopocha for locomotion and for Capturing prey Esample: amoeba and entamoeba that causes dysenting an hements, * Plaqellated protozoan's ca ) Zoo flagellglas - They are free living non- photo synthel flagellates without a cell wall. They possesss Hagells for locomotion and capturing preg. Example & trypanosoma 1596 Gueses sleeping rick ness in human's Caliated protozoans @ h ales : They are aquatic Organisms - Their Characlorillic teatures are the presence of numerous cilia on the entire body sterface and the presence of two types of nuclei All the Citia beat in the same chection to move the water laden food inside a Guily Scanned with CamScanner

Example & para me cicum. * sporozoans ó- They are lack cilia Example: sulhogenic and uninuclearedted and or flagella. plasomodium Causes malaria in hiemans. Scanned with CamScanner