crossword

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Across
  1. 4. an organism deriving its nutritional requirements from complex organic substances
  2. 6. cells of green leaves and young stem of plant contain numerous green structure
  3. 7. the process of taking in food by organism and its utilization by the body
Down
  1. 1. control opening and closing of stomata
  2. 2. chloroplast are green because of a green pigment
  3. 3. mode of nutrition where green plants make food themselves from simple substance
  4. 5. carbon dioxide from the air through tiny pores