Question

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

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.

Answer 1

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