the endosymbiotic theory reduced carbon compounds + o 2 high atp yield electron transport reduced...
Post on 20-Dec-2015
214 views
TRANSCRIPT
THE ENDOSYMBIOTIC THEORY
Reduced carboncompounds + O2
High ATPyield
Electron transport
Reduced carboncompounds
Low ATPyield
Fermentation
Aerobic bacterium
Anaerobic eukaryote
chain
Pyruvateand O2
ATP
1. Eukaryotic cell surroundsand engulfs bacterium.
2. Bacterium lives withineukaryote cell.
3. Eukaryote supplies bacteriumwith reduced carbon compounds.Bacterium supplies eukaryote withATP.
Figure 27.12
The first animals (metazoans)
• They did not appear until about 600 million years ago
• But they rapidly radiated - the Cambrian explosion
Hallucigenia
Opabinia - Burgess Shale
Opabinia - Burgess Shale
Wiwaxia - Burgess Shale
Wiwaxia - Burgess Shale
Yohoia - Burgess Shale
Marrella - Burgess Shale
Marrella - Burgess Shale
Anomalocaris - Burgess Shale
Choanoflagellata
Porifera - sponges
Collar cell of a sponge
Cnidaria - anemones
Cnidaria - jellyfish
Cnidaria - corals
Ctenophora - comb-jellies
Brachiopoda - lamp shells
Echinodermata
Hemichordata - acorn worms
Chordata - sea squirts, lancelets,
vertebrates
Platyhelminthes - flatworms
Nemertea - ribbon worms
Mollusca
Annelida - segmented worms
Annelida - earthworm
Annelida - polychaetes
Arthropoda - arachnids
Arthropoda - crustaceans
Arthropoda - insects
Arthropoda - centipedes and millipedes (myriapods)
Onychophora - velvet worms
Nematoda - roundworms