1 Allow the roast to stand at room temperature for one hour. 2  Set the roast on a rack in a roasting pan (fat side up) and put into a 450 degree F preheated oven for 15 minutes (be sure oven is preheated). 3  Turn oven down to 350 degrees F and continue roasting until your meat thermometer reads.
Unicellular protozoa and algae are unicellular eukaryotes. Pluricellular algae are also eukaryotes of simple structure. Protists are believed to be the phylogenetic ancestors of the living organisms of the other eukaryotic kingdoms (fungi, animals and plants).
Cilia and flagella are subcellular structures which propel protozoa through a fluid medium. Flagella are long whip-like structures which propel the organism as a result of wave-like beat which is propagated through their length.he earliest observations of protozoa noted their motility. This motility resulted in their classification as 'animals', which were distinguished from the non-motile 'plants'. However, motility is not a universal feature of protozoa and different protozoa utilize different mechanisms for their movement (Table).