BIOL 1002 Chapter : Chapter 44 Notes
Document Summary
Chapter 44: plant reproduction and development: asexual reproduction, part of a single plant divides by mitosis to give rise to a new plant. Sprouting of rhizomes (irises: offspring are genetically identical to parent plant, advantageous in a stable environment, sexual reproduction, two parent plants give rise to genetically variable offspring, allows offspring to cope with a changing environment or invade different. Involves meiosis, gamete formation, and fertilization habitats: plant life cycle is characterized by alternation of generations, multicellular diploid plants (sporophytes) and multicellular haploid plants (gametophytes) take turns, alternation of generations (aog) Sperm contained within tough, watertight pollen grains dispersed by wind or pollinators. Reproduction can occur in dry habitats: aog in flowering plants, diploid sporophyte produces flowers, within each flower, 2 types of haploid spores. Megaspore divides by mitosis to form female gametophyte (embryo sac), retained in flower. Microspore divides by mitosis to form male gametophyte (pollen grain) Each consists of a sticky stigma (catches pollen), an elongate style,
