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Below are photographs E and F, of two organisms, taken from their natural habitats. 
biopp221

  1.  
    • State the main nitrogenous waste product of the organism in photograph E. 
    • Give a reason tor your answer in a(i) above. 
  2. State why the organism in photograph E is usually found on top of rock surfaces even during hot, sunny days. 
  3.  
    • Which of the two organisms would have a higher biomass if both were left in their natural ecosystem.
    • Give a reason for your answer in c(i). 
  4. With reference to observable features, explain why the organism in photograph F is usually found in a wider range of habitats.

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  1.    
    • Uric acid
    • Uric acid requires little water to eliminate/ removal of uric acid conserves water/ it's less toxic, poisonous
  2.   
    • It is an octotherm/ poikilotherm/ exotherm
  3.   
    • F

       
    • Occupies lower trophic level/ biomass/ energy decreases up the trophic level
    • organism F is eaten by E

       
    • Dorsal-ventrally flattened thus able to penetrate crevices for food & safety
    • Has wings to fly
    • Antennae for sensory purposes
    • Exoskeleton for protection/ water conservation
    • Legs for movement
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