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15. ______ Primary succession in a forest generally follows which sequence? a. Forest fire; pioneer species; willows; shrubs

b. Abandoned farm; shrubby weeds; cottonwoods; pine trees

c. Flood; mosses; weeds; shrubs

d. Exposed rock; lichens; shrubs; trees

Respuesta :

Answer:

Option D

Explanation:

Primary succession usually occurs when newly exposed rock is colonized by living things for the first time and in this context, a newly exposed rock is first colonized by lichens (the pioneer species) then followed by shrubs and then tree.

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