01:119:116 Lecture Notes - Lecture 3: Unikont, Archaeplastida, Excavata
16 Oct 2018
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Document Summary
Classification of eukaryotes is continuously revised as new (molecular) data emerges. Clear differences exist (vs. prokaryotes: eukaryotes have a nucleus and other membrane bound organelles, well developed cytoskeleton, provides structural support that allows, asymmetrical shapes, change shape for feeding, moving, growing. Domain eukarya: fig 28. 2 eukaryotic tree, polytomy, root of eukaryotic tree is not clearly known, supergroup excavata, supergroup (cid:498)sar(cid:499) clade, supergroup archaeplastida, supergroup unikonta. Most single-celled (but some colonial and multicellular: single-celled does not imply simplicity, do same functions as multicellular organisms, but with sub-cellular organelles. Means of nutrition is very diverse: e. g. Er, golgi, lysosomes, nucleus: heterotrophs energy from absorbing other organic compounds, photo-autotrophs sunlight to chemical for energy. Generate own energy: mixotrophs mixture of both, all nutrition (cid:498)strategies(cid:499) evolved independently in different protest lineages, asexual (binary fission, sexual (all 3 major types and some variations of these) Means of reproduction also very diverse: fig 13. 6.
