What this tests
Syllabus point 14.5 — Tropic responses, in Coordination and response. Difficulty hard (estimated from the question's demands, not a Cambridge rating).
Also set in
The same question, as Cambridge printed it in other papers.
Cambridge IGCSE Biology 0610 · 14.5 Tropic responses
November 2018 · Paper 22 · Question 24
One real Cambridge question from Coordination and response, with the official answer. Cambridge has printed this question 3 times.