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

question 51

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 which provides support against gravity
• D) reduced size, mass, and persistence of the sporophytes which allows gametophores to grow taller
• E) the presence of conducting tissues in the "stem"

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