Plants increasing number

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Across
  1. 4. embryo turns into a new plant
  2. 5. plant grows with leaf
  3. 6. seed leaves
  4. 7. the transport of seeds away from the mother plant
Down
  1. 1. crop cultivation
  2. 2. 2seed leaves
  3. 3. 1seed leaf
  4. 8. underground stem