A conservation centre keeps snails collected from two coastal sites. Four findings are recorded during a breeding study. Which evidence would show that the snails from the two sites belong to the same species?
A snail from one site mates with a snail from the other site, and their offspring later produce young.
Snails from both sites grow successfully when they are given the same food.
Snails from each site produce eggs after mating with snails from their own site.
The offspring of snails from the two sites have shell colours between those of their parents.
122 exam-style questions on OCR GCSE Biology 5.2 Natural selection and evolution, covering 5.2.1 Genetic variation within a population, 5.2.2 Developments in classification systems, 5.2.3 How evolution occurs through natural selection, 5.2.4 Evolution as change over time, 5.2.5 Evidence for evolution, and 5.2.6 Darwin and Wallace. Each one has a worked solution and a mark scheme showing where the marks go.