Puzzle

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Across
  1. 3. father of economics
  2. 5. 5 Environmental day is celebrated on
  3. 7. scientific name of bird
  4. 11. is known as first step of digestion
  5. 12. collection of preserved plant specimens that have been stored appropriately
Down
  1. 1. green coloured component present in plants
  2. 2. self obsessed person
  3. 4. offer + acceptance
  4. 6. the state of a company that is unable to honour it's financial obligations
  5. 8. concept of mixing two atomic orbitals to give rise to a new type of orbitals
  6. 9. portion belonging to one person in a company
  7. 10. an individual who creates a new businesses