| Answer | Crossword Clue |
|---|---|
| pharmacognosy | the study of drugs of animal and plant origin |
| pharmacognosies | PHARMACOGNOSY, the study of drugs of animal and plant origin |
| pharmacognosist | a practitioner of pharmacognosy, the study of drugs of animal and plant origin |
| biosystematics | Taxonomy based on the study of the genetic evolution of plant and animal populations |
| phenology | The study of cyclic and seasonal natural phenomena, esp. in relation to climate and plant and animal life |
| alkaloid | Any of a class of nitrogenous organic compounds of plant origin that have pronounced physiological actions on humans. They include many drugs (morphine, quinine) and poisons (atropine, strychnine) |
