IB skill practice

Analyse population interactions and food webs

Paper 1, Paper 2 5 marks Difficulty 5

Explain competition

Two bird species in a Melbourne DP Biology class feed on the same small insects during a dry season. Identify the interaction and explain why it can affect population size. Enter the answer and choose the interpretation that best matches the biological evidence.

Worked practice: biological evidence and answer

Use the labelled biological evidence first, then connect it to the final answer.