A Certain Species of Pine Tree Survives Only in Scattered

question 79

Multiple Choice

A certain species of pine tree survives only in scattered locations at elevations above 2,800 m in the western United States.To understand why this tree grows only in these specific places,an ecologist should

• A)conclude that lower elevations are limiting to the survival of this species.
• B)investigate the various biotic and abiotic factors that are unique to high altitude.
• C)conduct soil analysis for growth supporting chemicals in the vicinity of these trees.
• D)collect data on temperature,wind,and rainfall at several of these locations for a year.

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