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York University
BIOL 2030

Lab 1 Kingdom ProtistaTaxanomic characteristicsProtista kindgdom is paraphyletic A group of taxa is said to be paraphyletic if the group contains its last common ancestor but does not contain all the descendants of that ancestor Protists are heterotrophic and motileall life process is within the single celldigestion takes place in food vacuolewater regulation is through contractile vacuole reproduction is though binary fissionclassified through locomotion cilia flagella amoeboidEuglena Free living Protozoa Phylum Euglenozoa Subphylum Euglendia have chloroplasts with chlorophyll bClass Euglenoidea some are found to have a lightsensitive stigma or eyespot which allows light only from one direction to strike a light sensitive receptorOrder Euglenales Genus EuglenaEuglena is a plantlike flagellate and may contain chloroplastfreshwater flagellate Spindleshaped body that moves by means of a single anteriorly projected flagellum and a second very short flagellum also has a function in locomotionworm like and expansion of the body is known as euglenoid movement stigma found at the base of the flagellum its a photoreceptive pigment or eyespot contractile vacuoleused for osmoregulation found posterior to the reservoir flagellum arises from a clear pearshaped area Cytopharynx is used for ingestion of preysmost obvious structure are the chloroplasts the shape and arrangement of the chloroplasts are used to determine the species of EuglenaTrypanosomaPhylum Euglenozoa Subphylum Kinetoplasta all parasitic in animals and plants have a unique organelle the kinetoplast which is part their mitochondrion and is composed of a large disk of DNA Class Trypanosomatidea Gensus Trypanosomaall are parasitic in blood of man and vertebrates Typanosoma gambiense agent of African sleeping sickness transmitted by tsete flies the undulating membrane is made of a row of cilia that form a sheet and beat in synchronyIdentify NucleusUndulating membraneFlagellum
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