Saturday, December 8, 2007

Concept 29.3

Question:
I. How do bryophytes differ from other plants?

Answer:
a) Bryophytes are described as non-vascular plants, meaning they do not have phloem or xylem. Another difference is that their life cycles is dominated by a gametophyte rather than sporophytes.

Question:
II. Give three examples how structure fits function in bryophytes.

Answer:
a) protonema - large surface area enhances absorption of water and minerals; shape of archegonia - protects eggs during fertilization and transport nutrients to the embryos via placental transfer cells; seta - conducts nutrients form the gametophyte to the capsule where spores are produced.

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