Eugelophyta And Dinophyta Flashcards
Phylum Euglenophyta and Dinophyta are the product of _______ endosymbiosis
Secondary
Euglenoids chloroplasts arose from secondary endosymbiosis of a green algae and are surrounded by 3 membranes
Order Euglenales
Appearance and structures
-unicellular algae
-cylindrical or fusiform body (tapered), flattened or rounded
-pellicle allows for change of cell shape
-2 flagella
-no true cell wall
-may have Lorica
-eyespot
-large nucleus
-anterior gullet
-paramylon
Where is the pellicle
Under plasma membrane
Chloroplasts of order Eugelnales have what pigments
Discoid chloroplasts - Chlorophyll a and b
Storage product of order Euglenales
Paramylon
The majority of Euglenales are ________ but small flagellate, ________ exist
Unicellular
Sessile complies (fresh water)
Euglena sp.
-shape
-paramylon grains
-flagella
Fusiform
Some have colourless paramylon grains
Single emergent flagella which arises from a gullet
Plague sp. appearance
-rigid pellicle
-paramylon granules circular
-gullet: depression in anterior region of cell where the flagellum emerges
Lorica
An incomplete cell wall with an opening for the flagella
Order Euglenales
Trachelomonas sp.
-appearance
-protective envelope that surrounds the protoplast (no cell walls); may be ornate
-contains anterior opening for flagellum
-rigid Loricae surrounds cell
Dinophyta contains _______, _______ algae
Unicellular
Biflagellate
Dinophyta flagella
Order Peridinales
Flagella of unequal length, arise from transverse girdle (Cingulum) which separates the organism into upper (epicone) and lower (hypocone) portions
One flagella lies in the groove (tinsel flagellum) while the other trails and it propulsive
Sulcus: second, longitudinal groove, holds the longitudinal, whiplash flagellum
Order Peridinales
Cells are covered with a ______ which may appear _____ or constructed of ______
Theca
Clear
Thick articulating plates
Order Peridinales
Chloroplasts
Contain chlorophyll a and c
Eyespot and chloroplast appear yellow green to golden brown due to carotenoids
Peridinium sp.
An armoured dinoflagellate, whose thecal plates are conspicuous and separated by raised sutures
