O

  • Obligate anaerobes
  • Omega 6 fatty acid
  • Open circulator system
  • Operon
  • Organ
  • Organic
  • Origin of replication
  • Osmosis
  • Ostrich
  • Oviparous
  • Owl
  • Oxidation reduction
  • Oxidizing agent
  • Ocyte
  • Omnivore
  • Open vs closed circulatory system
  • Oral
  • Organ system
  • Organic acid
  • Orotic acid
  • Osmotic lysis
  • Ovary
  • Ovipositor
  • Ox
  • Oxidative phosphorylation
  • Oxygen
  • Offspring
  • Oncology
  • Operator
  • Oral cavity
  • Organelle
  • Organim
  • Orthologous gene
  • Osmotic pressure
  • Overpopulation
  • Ovule
  • Oxidation
  • Oxidize
  • Oyster