BugBitten

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Across
  1. 4. Organism that a parasite lives on or in
  2. 5. Invasion and multiplication of harmful microorganisms
  3. 7. Parasitic worm such as a tapeworm or roundworm
  4. 8. Carrier that transfers parasites between hosts, often an insect
  5. 9. Series of developmental stages of an organism
  6. 10. Disease-causing biological agent
Down
  1. 1. Close biological relationship between two species
  2. 2. Single-celled organisms, some of which are parasitic
  3. 3. Presence of parasites on the body or in an environment
  4. 6. Spread of disease-causing organisms from one host to another