Crossword puzzle:

Edit Answers
123456
Across
  1. 3. organisms that live on other living
  2. 5. the process of taking in food by an organism
  3. 6. the mode of nutrition where two different
Down
  1. 1. work together for their mutual
  2. 2. and derive the food from them.
  3. 4. its utilization by the body.