[NSCI 1404] - Final Exam Guide - Comprehensive Notes for the exam (29 pages long!)

• School: Fordham University
• Department: Natural Science
• Course: NSCI 1404
• Professor: Mark Botton

Document Summary

The multicellular haploid plant structure is called the gametophyte, which is formed from the spore and give rise to the haploid gametes. The fluctuation between these diploid and haploid stages that occurs in plants is called the alternation of generations. Sporophyte phase produces spores, while gametophyte phase produces gametes (egg and sperms). Therefore, sporophyte phase is asexual, while gametophyte phase is sexual. Sporophyte is a diploid phase (2n) due to the formation of zygote, while gametophyte is a haploid phase (n) due to the occurrence of meiosis. Relate life cycle characteristics to the evolution of terrestrial plants (e. g. why are seed plants much better adapted for terrestrial life than mosses or ferns). Of the two sperm cells, one sperm fertilizes the egg cell, forming a diploid zygote; the other sperm fuses with the two polar nuclei, forming a triploid cell that develops into the endosperm.