The 2-M Height Attainable by Polytrichum Moss Is at the Upper

question 14

Multiple Choice

The 2-m height attainable by Polytrichum moss is at the upper end of the size range reached by mosses. What accounts for the relative tallness of Polytrichum?

• A)the cuticle that is found along the ridges of "leaves"
• B)"leaves" that are more than one-cell-layer thick
• C)high humidity of surrounding air provides support against gravity
• D)reduced size, mass, and persistence of the sporophytes allows gametophores to grow taller
• E)the presence of conducting tissues in "stem"

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The belief, held by some psychologists, that behavior is primarily determined by the immediate situation and that personality traits are not very important.

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