.4 adaptations

• Organisms have features (adaptations) that enable them to survive in the conditions in which they normally live. These adaptations may be structural, behavioural or functional
• Structural adaptation - physical feature of an organism that helps it to survive.
• Functional adaptation - how something works within an organism's body.
• Behavioural adaptation - how an animal behaves towards its environment.
• Some organisms live in environments that are very extreme, such as at high temperature, pressure, or salt concentration. These organisms are called extremophiles. Bacteria living in deep sea vents are extremophiles.