What this tests
Syllabus point 9.1 — Circulatory systems, in Transport in animals. Difficulty easy (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 · 9.1 Circulatory systems
November 2018 · Paper 23 · Question 17
One real Cambridge question from Transport in animals, with the official answer. Cambridge has printed this question 3 times.