What conclusions can be drawn from the studies on bent grass in a copper-polluted field and the neighbouring population in an unpolluted field?

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The studies on bent grass in a copper-polluted field and the neighboring population in an unpolluted field found that they have different flowering schedules. This suggests that isolation may be developing. However, there is no evidence to suggest that the flowers in the polluted field will not survive or that the population now requires copper to survive. There is also no evidence to suggest that they have different types of gametes, so isolation has taken place.

What Conclusions Can Be Drawn from the Studies on Bent