Ecology Introduction

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Across
  1. 2. the study of interactions between organisms and their environment
  2. 4. a group of organisms of the same species
  3. 7. organism in a food chain that are able to absorb sunlight and make their food
  4. 9. refers to the dry mass of an organism
  5. 10. pyramid of _____ refers to a graphical representation of the number of organisms at each trophic level of a food chain
  6. 11. natural or physical environment that organisms live in
Down
  1. 1. organism that breaks down the bodies of dead organisms
  2. 3. organism in a food chain that obtain energy by feeding
  3. 5. _____ level refers to the position an organism occupies in a food chain
  4. 6. includes both the organisms interacting with each other and the environment
  5. 8. two or more populations living in the same physical environment