Across
- 2. Insects that penetrate the plant stem to drink from the phloem. These act as plant pathogens and can also carry viruses, bacteria and fungus.
- 3. Pathogens a lot smaller than bacteria that can only reproduce inside cells of other organisms.
- 4. Medicine that doesn't contain the active ingredient being tested.
- 5. A change in the genetic material of an organism.
Down
- 1. The yellowing of leaves when they can't produce chlorophyll due to lack of magnesium.
- 3. Dead or inactive pathogen material used to develop immunity in a healthy person.
- 4. Microorganisms that cause disease.