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