| Answer | Crossword Clue |
|---|---|
| ALAR | Substance called a pesticide by the E.P.A. |
| ALAR | Product called a pesticide by the E.P.A. |
| toxicant | A toxic substance introduced into the environment, e.g., a pesticide |
| lymphokine | A substance produced by lymphocytes, such as interferon, that acts upon other cells of the immune system, e.g., by activating macrophages |
| lymphokines | A substance produced by lymphocytes, such as interferon, that acts upon other cells of the immune system, e.g., by activating macrophages |
