BIOL 221 Lecture Notes - Lecture 2: Contractile Vacuole, Petri Dish, Diatomaceous Earth
Document Summary
*important to ecosystems for reproducing energy and pioneering colonies in new areas* Has a ring chromosome, otherwise known as a plasmid. Conducts binary fission instead of meiosis or mitosis. Conducts photosynthesis without chloroplasts, instead their outer membrane conducts the functions of a chloroplast. Euglena: dinoflagellates, diatoms, brown algae, red algae, green algae. Flexible because of a lack of a cell wall, instead has a movable cell wall structure call the pellicle. Has a red eye spot for perception of light (phototaxi) Photosynthetic (usually an autotroph but in the dark can be a heterotroph) Contractile vacuole (not a large central vacuole) Does not hold water but contracts it so that the pellicle does not burst. Has 2 flagella, one long and one short both perpendicular to each other (mobile) Has no pellicle, instead it had a rigid flecca plat between two membranes, this organism is not flexible. Distinct pigment called peridinin (a brown/ red color)
