Photo AI
Scientists can show the relationships between organisms in a variety of ways - Edexcel - GCSE Biology - Question 3 - 2011 - Paper 1
Question 3
Scientists can show the relationships between organisms in a variety of ways. This food chain shows the energy content at each trophic level. This food chain shows ... show full transcript
Worked Solution & Example Answer:Scientists can show the relationships between organisms in a variety of ways - Edexcel - GCSE Biology - Question 3 - 2011 - Paper 1
Step 1
Calculate the percentage of energy that is transferred from the rabbits to the fox.
Answer
To find the percentage of energy transferred from the rabbits to the fox, we can use the formula:
ext{Percentage} = rac{ ext{Energy transferred}}{ ext{Energy in rabbits}} imes 100Substituting in the values:
ext{Percentage} = rac{90 ext{ J}}{780 ext{ J}} imes 100 \\ = 11.54 ext{%}Therefore, approximately 12% of the energy is transferred from the rabbits to the fox.
Step 2
State two ways in which energy can be lost between the trophic levels of the rabbit and the fox.
Answer
-
Energy is lost through respiration, as the rabbit uses energy for its metabolic processes.
-
Energy can be lost through excretion, as not all energy consumed by the rabbit is absorbed and utilized.