Why does it take 75 years for a beech-maple to occur in the figure above?
(A) Beech seeds have a very long period of dormancy prior to germination.
(B) It takes an average of 75 years for conifer trees to become extinct.
(C) Agriculture was the predominant industry, and hardwood trees were removed.
(D) Maple trees grow better in a pine forest than they do in a grassland.

The following diagram demonstrates the ecological succession that occurs in an environment over time as it is colonized by different species.

Transcribed Image Text:

Mineral Grass-herb 1 year 25 years Shrub White pine-spruce 50 years Sere 75 years Beech-maple 100 years