4) Adaptations

• Organisms have adaptations (features) that enable them to survive in the

  conditions in which they normally live.
• These adaptations may be structural, behavioural or functional.
• Some organisms live in environments that are very extreme, e.g. with high

  temperature, pressure or salt concentration. These organisms are called

  extremophiles.
• Bacteria living in deep-sea vents are extremophiles.