| Answer | Crossword Clue |
|---|---|
| photophils | PHOTOPHIL, an organism that seeks the light |
| photophil | an organism that seeks the light |
| zeitgeber | (German) an environmental cue, such as light, that helps to regulate the biological clock in an organism |
| zeitgebers | ZEITGEBER, (German) an environmental cue, such as light, that helps to regulate the biological clock in an organism |
| phototaxy | the movement of an entire organism in response to light |
| phototaxies | PHOTOTAXY, the movement of an entire organism in response to light |
