To survive and reproduce organisms need a supply of materials from their environment.
Physical factors that may affect organisms include:
- Temperature
- Amount of light
- Avaliability of water
- Avaliability of oxygen and carbon dioxide
If the animal has a large surface are in relation to its volume it will lose heat rapidly
Adaptations to the environment:
In hot environments:
Surface area of extremities - large
Thickness of insulating coat - thin
Amount of body fat - little/none
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