BIOL 121 Lecture Notes - Lecture 5: Uropygial Gland, Caulerpa, Unicellular Organism
Document Summary
Dr. chilton used top hat to give 3 questions. Protists larger than bacteria: 0. 8 (cid:1005)(cid:1004)(cid:1004)"s m 9 (some 2mm: eg. micrasterias green alga (protest) = 100x 160 m. Exception: green alga caulerpa tacifolia (cid:894)(cid:862)killer(cid:863) alga; seaweed(cid:895) Prokaryotes: gk: pro= (cid:862)before(cid:863) and karyon = (cid:862)kernel(cid:863) or (cid:374)ucleus, lack a membrane-enclosed nucleus, e. g, bacteria. Eukaryotes: gk: eu = (cid:862)true(cid:863) or (cid:862)real(cid:863) true nucleus, with membrane-enclosed nucleus, membraned abound organelles (mitochondria, nucleus, etc. , e. g. protist, life requires a constant input of energy and raw materials. Autotrophs: synthesize their ow(cid:374) food (cid:894)(cid:862)self-feeders(cid:863)(cid:895, regenerate their own energy. Use an external energy source to produce organic matter from inorganic raw materials. Photoautotrophs: use light from sun (energy) and inorganic materials (h2o and co2) Chemoautotrophs: use inorganic compounds (h gas; s, nh3, nitrites, fe) as energy sources. Heterotrophs: require preformed organic molecules, use energy in organic matter obtained (eaten) from other organisms.
