[BIO 1106] - Final Exam Guide - Everything you need to know! (26 pages long)
29 Nov 2016
School
Department
Course
Professor
Document Summary
Pollen released in late spring is carried to ovulate cones, in which pollen sifts thru ovuliferous scales and sticks in a drop of resin at the micropylar end of an ovule. Occurs more than a year before the ovule produces a mature female gametophyte. Pollen grain then germinates and grows a tube into the archegonium, where it releases two nonmotile sperm nuclei. one disintegrates, other fuses w/ egg to form zygote. Zygote while in ovule develops into the embryo of a new sporophyte. Ovule is now a seed consisting of an embryo, a seed coat (integuments of megasporangia), and a food supply (tissue of megagametophyte) Three antipodal cells that do not participate in reproduction. Hydra, obelia (pg 406 - 407) basal disk: in hydra, polyps hang from water"s surface with these disks adhering to water surface gastrozooid: specialized feeding polyp gonozoid: reproductive polyp.
