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  • Created by: hannah
  • Created on: 04-06-13 13:38

Adaptations - Desert Animals

Desert Animals

Large surface area comapred to volume:

  • Desert animals lose more body heat 

Efficient with water:

  • Desert animals lose less water by producing small amounts of concentrated urine
  • Sweat little

Good in hot conditions:

  • Desert animals have thin layers of body fat and thin coat to help them lose body het.

Camouflage:

  • A sandy colour give good camouflage -avoid predeators, or sneak up on prey.    
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Aadaptations - Arctic animals

Arctic Animals

 small surface area compared to volume: 

  •  Animals living cold conditions have a compact shape.

well insulated:

  • They have thick layer of blubber for insulation- this also acts as an energy store Thick hairy coast, greasy fur sheds water.

camouflage:  

  • Arctic animals have white fur to help the predators or sneak up on pery
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Adaptations - Desert Plants

Desert plants 

small surfaces area

  • plants lose water vapour from surface of their leaves
  • small surface area comapred to their size, which also reduces water lose

water storage tissues 

  • eg. cacatus stores water in it thick stem

maxumising water absorption 

  • some cacti have shallow but esnesive roots to absorb water quickly over a large area. others have ddeo roots to accesss underground water
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Adapted to deter predators and Microorganisms

Plants and animals 

There are various special features used by animals and plants to help protect them:

1. Some plants and animals have Armour- like roses (thorns) and cacti (sharp spines)

2. Others produces poisons- like bees and poison ivy

3. Some have warning colours to scare off predators - like wasps 

Microorganisms 

They have a vraiety of adaptions so trhey can live in a wide range of enviroments.

e.g some microorganism ( e.g bacteira) are known as EXTREMOPHILES- they're adapted to live in a seriously extreme conditions like super hot volcanic vents, in salty lakes or at high presure on the sea bed 

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Competition - Organisms

Organisms 

Organisms need things from their enviroment and from other organisms in order to survive and reproduces:

1. Plants need LIGHT,SPACE,WATER and MINERALS (nutrients) from soil

2. Animals need SPACE,FOOD,WATER and MATES

Organisms compete with other species for the same resources.

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Environmental changes - factors

Living Factors:

1. A change in the occurrence of Infectious Diseases 

2. A change in the number of Predators 

3. A change in number of prey or availability of food sources 

4. A chnage in number or types of competitors 

Non-Living Factors:

1. A change in average temperature

2. A change in average rainfall

3. A change in the level of air or water pollution 

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