Which is an example of temporal isolation?
A. two plant species have incompatible gametes.
B. one plant species is pollinated by bees and a second plant species is pollinated by moths.
C. two plant species live on the same mountainside, but one lives on rocky outcrops and the other in open meadows.
D. one plant species blooms in June-July and a second plant species blooms in August-September.
Answer: D
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