Plant Growth Crossword Puzzle

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Across
  1. 4. Underground storage organ of a plant (5 letters)
  2. 5. Process in which seeds move from plant flower and are re-planted (9 letters)
  3. 7. Developmental stage between seedling and mature plant (8 letters)
  4. 8. Process of converting sunlight into energy (9 letters)
Down
  1. 1. Protective outer layer of a seed (4 letters)
  2. 2. Transfer of pollen from plant to plant (11 letters)
  3. 3. Mature plant reproductive organ (6 letters)
  4. 4. Life stage of a flower (7 letters)
  5. 6. Initial growth from a seed (5 letters)