Progressive Plants

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Across
  1. 3. characteristic which help plants survive
  2. 5. cactus stem
  3. 7. tree growing on mountains
  4. 8. modified leaves of cactus
Down
  1. 1. plant's natural environment
  2. 2. common desert plant
  3. 4. tree shedding leaves in autumn
  4. 6. tree bearing cones