Competitive Exams: Revision Terminology Part 52

Chemical Evolution

  1. Earliest atmosphere on earth – reducing.

  2. Formation of early molecules.

  3. Formation of simple org molecule.

  4. Formation of large org. molecule.

  5. Formation of complex biomolecule for miller – CH4, NH3, H2, H2o.

  6. Formation of coacervates abiotically synthesis on earth & came together due to intermolecular attraction – could divide & chemical reaction.

  7. Formation of protocells Clusters of nucleoprotein which surrounded org. subs for replication.

  • 1st organism – heterotrophic, anaerobic, nucleoprotein.

  • Progenote – single celled common ancestor of archebacteria, eubacteria & eukaryotes.

  • Excretion – elimination of metabolic waster & undigested food from body toxic – NH3 > area > uric acid.

  • Ascaris Ex eartherwom – NH3, urea.

  • Urine – urochrome (from breakdown of Hb)

  • Faeces – bilirubin + biliverdin

  • Muscle – creatine phosphate.

  • Concutrer current mech – overll to conc nace in the fluid & callse water to diffuse out in collecting tubules & concentrate the urine.

  • Flatworms – Flame cells.

  • Roundworms – H shaped cells.

  • Annelida – nephridia.

  • Arthropods – green gland (crustaceans).

  • Spiders – Coxal Gland.

  • Unio – organ of Bojanus.

  • Cephalochordates – Hatschck’s nephridia.

  • Ureter – transitional epithelium.

  • Podocytes – lining of Bowman’s capsule ultrafiltration areas.

  • Trimethylamine oxide – marine teleost.