Environmental studies

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Across
  1. 2. it comprises living things such as plant and animal
  2. 4. is the example of primary producer
  3. 5. it is important valuable source of mankind
  4. 6. feeding position of web or food chain of a ecosystem
  5. 8. where one living organisms eat another organisms and that organism is eaten by another bigger organisms
  6. 9. defined as any fuel sourced derived from biomass
  7. 10. existence of variability among living organisms on earth and between species and between ecosystem
  8. 11. function of ecology where living organisms interact with other organisms
Down
  1. 1. digest dead and decaying plants and animals
  2. 3. resources it is re generatedthrough recycling within a specified time
  3. 4. is the first trophic level
  4. 7. it includes non-living things such as land