excretion in plants

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Across
  1. 2. kind of alkaloid
  2. 3. tiny openings on leaf surface
  3. 6. acacia plant produces this plant product
  4. 7. process of loss of water from plants
Down
  1. 1. porous tissue made up of vast intercellular gaps between cells
  2. 4. waste produced during photosynthesis
  3. 5. dioxide waste produced during respiration