BIOL 201 Lecture Notes - Lecture 1: Paraphyses, Antheridium, Archegonium
Document Summary
Most are haploid containing only one set of chromosomes. Their small and compact form allows them to stand upright. Film of water on the leaves and stem tip. Consists of a neck, venter, and a stalk (base) Inside the neck, the breakdown of cells forms a central canal containing sperm attractant. Help to hold the water around the stem tips. Form gametes called gametophytes o o o o. Fertilization o o o o o o o o. The embryo o o o o o o o. A rain shower is ideal condition for the transfer of sperm to egg. Droplets of rain are collected at the tips of the moss stems. This causes antheridia to open and disperse sperm cells. Some rain drops contain sperm cells and land on female. Sperm and egg nuclei fuse creating a diploid zygote. Zygote remain in venter where an embryo is formed. One end of embryo grows out of venter and into female stem.
