BIO153H5 Study Guide - Final Guide: Wollemi National Park, Wollemia, Charales
Document Summary
Plants iii - lecture 8 jan 30/2013: wollemi national park, australia species discovered september 10, 1994. Wollemi pine wollemi nobilis found by a man doing a patrol. Belongs to a group of trees that had last existed at least 65 mya. Only 40 trees left in a small radius. Reproductive adaptation: reproduction in water is easy sperm swim to eggs. Spores can be released in water, spread out and float around by current: bryophytes still require water (ex. Polytrichium piliferum splash cups) requires raindrop to pick up piece gametophytes and land near egg: began with stoneworts: first organism to produce female and male gametes in structures specifically developed for that purpose. In water, zygote detaches from parent and grows while in stoneworts, they are retained on parent. Parental plant dies in winter, and zygote sinks to bottom with adult but grows in spring when the climate warms: land plants have specialized reproductive organs: gametangia.
