BIO153H5 Chapter Notes - Chapter 28: Genetic Variation, Vacuole, Phycoerythrin
Document Summary
Concept 28. 1: protists are a taxonomically diverse group of eukaryotes. The kingdom protista is polyphyletic: some protists are more closely related to plants, fungi, or animals than they are to other protists; the kingdom protista has been abandoned, with various protest lineages being recognized. Eukaryotic cells have a nucleus and other membrane-bound organelles which provide specific locations in which certain cellular functions are accomplished (making structure and organization of eukaryotic cells more complex) Most protists are unicellular, although there are come colonial and multicellular species. For photos(cid:455)(cid:374)theti(cid:272) e(cid:374)dos(cid:455)(cid:373)(cid:271)io(cid:374)ts, it"s likel(cid:455) that the host (cid:449)as a(cid:271)le to (cid:862)steal(cid:863) a portio(cid:374) of the sugars (cid:271)ei(cid:374)g (cid:373)ade by the algae through photosynthesis or was acquiring some other essential metabolite. Over time, the relationship became more interdependent until the alga was reduced to an organelle. Most of the genes (except a few remaining on the plastid genome) were moved into the nucleus of the host; many other non-essential ones being lost entirely.
