Nutrition in plants

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Across
  1. 4. small pores usually at the under surface of the leaf
  2. 5. a relation between alga and fungus in lichens
  3. 6. plant that has lid which can open and close
Down
  1. 1. bacteria that lives in root nodules of legumes
  2. 2. plants that provides food to parasitic plants
  3. 3. organisms that prepare their own food