Part B The characteristics of two snail populations are shown.
• Population 1: high degree of genetic variation among
snails living in a wood environment at higher
elevations
• Population 2: all snails have the same traits specialized
for a hedge environment that is found in warmer
locations
Explain how each snail population will likely be affected if the
trend shown in Graph 2 continues. Use evidence from Graph
1, Graph 2, and Figure 1 to support your explanation.