Feeding relationships

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Question 37
Medium

The table below shows information about how energy is transferred in a herbivorous mammal (koala) and an insectivorous reptile (gecko).

AnimalPercentage of energy in food absorbedPercentage of absorbed energy released by respirationPercentage of absorbed energy assimilated into biomass
Koala (mammal)35.0%94.5%5.5%
Gecko (reptile)82.0%38.0%62.0%
a.

Suggest why the koala absorbs a lower percentage of energy from the food it eats than the gecko.

[2]
b.

Suggest why the koala releases a much higher percentage of the absorbed energy by respiration than the gecko.

[1]
c.

The data suggests that reptile production is highly energy-efficient compared to mammal production. Using your knowledge of energy transfer, suggest two ways in which the productivity of farmed cattle could be improved by a livestock farmer, explaining the biological reason for each.

[4]

Feeding relationships Questions

  1. IGCSE
  2. /Biology
  3. /Feeding relationships