BIOL 2325 Chapter Notes - Chapter 5: Lobopodia, Axoneme, Commensalism
Document Summary
Mitochondria and plastids are the same size as a prokaryote cell. 10 000 symbiont species: can be mutualistic, commensalistic, and parasitic. Flagellate-one or more flagella used to propel. Amoeba- irregular shape due to flowing protoplasm. Nucleus- membrane bound structure communicated with cytoplasm via pores. Nucleoli-assemble rrna which copy parts of dna to make proteins. Chromatin- long thin dna fibres with proteins attached. Mitochondria- energy acquisition, maternally inherited, shape of cristae can determine some clades, when absent cells have hydrogenosomes(produce h when o is absent) Plastids- site of photosynthesis, pigments in chloroplasts may indicate shared ancestry. Extrusomes- membrane bound organelle used to extrude material from a cell. Create water currents for feeding and respiration. Cilia and flagella- 9 pairs of microtubules arranged around a central pair enclosed in a central membrane. Kinetosome(basal body)- located at the base of the axoneme. Lobopodia- large blunt extensions of the cell body. Reticulopodia- rejoin to form net like mesh.
