BILD 3 Chapter Notes - Chapter 13: Hybrid Zone, Allopatric Speciation, Reproductive Isolation
Document Summary
Higher altitude of yellows meet lower ones of fires. Archaean world: no oxygen, vapors of hcl and h2so4, no sunlight. For 2 billion years, bacteria were only forms of life. Cyanobacteria learned to use available resources like water to use hydrogen and release oxygen, which invented photosynthesis. Oxygen levels increased, which was toxic to lots of anaerobic bacteria. Oxygen-using organisms had advantages: more efficient way to produce energy, vanquished competitor organisms. At first, cyanobacteria"s o(cid:454)(cid:455)ge(cid:374) produ(cid:272)t (cid:272)o(cid:373)(cid:271)i(cid:374)ed (cid:449)ith iro(cid:374) to for(cid:373) ferri(cid:272) o(cid:454)ides, (cid:449)hi(cid:272)h sank to the bottom of seas, causing rust. When cyanobacteria went through chemical routines, became slightly tacky, which trapped microparticles of dust and sand, forming stromatolites, like living rock, represe(cid:374)ti(cid:374)g (cid:449)orld"s first cooperative venture. Organisms took advantage of the environments it created. Made complex life possible: allowed oxygen manipulation to liberate energy from foodstuffs. The(cid:455) (cid:373)ai(cid:374)tai(cid:374) their o(cid:449)(cid:374) dna, reprodu(cid:272)e at different time from host cell.
