Adaptations

• What do organisms have to AID EXCHANGE?

  Behavioural and physiological adaptations
• What do animals with a high SA:Vol ratio tend to do?

  Lose more water as it evaporates from their surface
• What do some desert animals have?

  Kidney structure adaptations
• Why do some desert animals have kidney structure adaptations?

  So they produce less urine to compensate with the water loss
• what do small mammals living in COLD REGIONS need to do to SUPPORT THEIR HIGH metabolic rates?

  eat large amounts of high energy foods eg seeds and nuts
• What may SMALLER MAMMALS have for when the WEATHER gets really cold?

  thick layers of fur or hibernate
• what do large organisms living in hot regions (eg hippos) find it hard to do?

  keep cool because their heat loss is relatively slow

  • elephants - large flat ears to increase SA =more heat loss
  • hippo- behavioural adaptation- spend lots of time in water - helps them lose heat