100%(1)1 out of 1 people found this document helpful
This preview shows page 1 - 3 out of 3 pages.
Plastids chloroplasts, chromoplasts, and amyloplasts C.Eukaryotic Evolution •The root of Eukarya is not known ○Eukaryotic tree is a polytomy ○Four monophyletic Supergroups 1.Excavates 2."SAR" Clade 3.Archaeplastida 4.Unikonta ○Most eukaryotic lineages are unicellular protists ○But rest are land plants, fungi and animals Protists: Four Supergroups •What is a protist? ○"The very first" Protist Monday, January 30, 2017 11:34 PM This section is read-only.
•Arose through endosymbiosis ○Very diverse •Many multicellular ○Many nutritional strategies A.Excavates ○Shared ancestral traits •Single celled •Genetic similarities •Some members have feeding groove ○Derived traits •Mitochondria type differs in each subgroup 1.Diplomonads •Derived traits •Mitosomes= ETC nonfunctional, no O2 •2 equal sized nuclei •Ex: Giardia intestinalis •Parasitic •Major cause of diarrhea throughout the world 2.Parabasalids •Derived traits •Hydrogenosomesmodified mitochondria •Aerobic •Releases H2 •No plastids •Ex: Trichomonas vaginalis •Sexually transmitted parasite •Causes trichomonas (STD) 3.Euglenozoans •Derived traits •Normal mitochondria •Spiral or crystalline rod inside flagella •2 ex: •Kinetoplastids free living or parasites •Trypanosoma brucei (African sleeping sickness) •Euglenids mixotrophs B."SAR" Clade S