ap plant study guide-8b

Unit 8B – Plants

Know the following:

  • water potential of a turgid plant cell in pure water
  • adaptations of hydrophytes
  • what occurs if guard & surrounding epidermal cells are K+ deficient
  • how stomata are opened & closed
  • what must the plant expend for bulk flow of water in the root apoplast
  • which part of an oat seedling detects the direction of light
  • effect of gibberellins on the aleurone layer of seeds
  • how plant hormones determine the bending of plants toward light
  • what hormone might produce normal growth in a mutant dwarf plant
  • what can function as a sink in plants
  • why does photosynthesis decrease in wilting leaves
  • what are epiphytes
  • what is chlorosis
  • what soil characteristics would be the least productive to plant growth
  • what happens to most water taken up by a plant
  • how solutes move in plants according to the pressure-flow hypothesis of phloem transport
  • what causes guttation to occur
  • why does most of the water in xylem move upward in a tree
  • what property of water causes cohesion of its molecules
  • function of companion cells
  • what 2 elements make up most of the dry weight of plants
  • what could be the harmful effect of spraying a fungicide on a woodlot
  • what do carnivorous plants supplement by eating insects
  • why is nitrogen fixation so important
  • what would be characteristics of soil well suited for plant growth
  • what is the function of micronutrients in plants
  • what elements are micronutrients needed by plants
  • what elements are macronutrients needed by plants
  • what is meant by double fertilization
  • what are some "vegetables" that technically are fruits
  • why is sexual reproduction an advantage to plants
  • what  is the megaspore mother cell & what does it do
  • what do male gametophytes produce in plants
  • name 4 flower parts that are modified leaves
  • what is the function of a seed’s radicle
  • what forms pollen on a plant
  • what do the 2 sperm nuclei fertilize in plants
  • what causes seed germination
  • what floral parts are involved in pollination & fertilization
  • what things can function in signal transduction in plants
  • what is needed by a short-day plant for it to flower
  • what type of tropism do vines use to grow toward tropical trees
  • why do plants use changes in photoperiods instead of air temperature changes to trigger dormancy
  • what is needed to get poinsettias to bloom  early in December
  • do plant hormones act the same on all root & stem tissues
  • what hormone is involved in the rapid opening & closing of stomata
  • what effect do auxins have on stem cuttings that are to be rooted