BISC 1112 Study Guide - Midterm Guide: Antheridium, Archegonium, Guard Cell
Document Summary
Dry air passes across the laves and causes water vapor to evaporate out of the stomata. The loss of water from the leaves creates a type of suction that draws water up the stem through the xylem. New water enters the plant through the roots to replace the water: stomatal opening and closing moving up the stem. Guard cells control the opening/closing of stomata, therefore controlling water and gas exchange. When water enters the guard cell, the stomata becomes turgid, and swells opening. Spores are released and either form a female or male gametophyte. When the haploid sperm is released from the antheridia and swim to the haploid egg in archegonia, they come together during fertilization they form a diploid cell. This cell becomes a diploid sporophyte, and matures (2n), then beginning the cycle over again when it released spores (n) Ferns produce a spore that will grow into a gametophyte (n) which produces archegonia and antheridia.
