21.8: Chapter 8
( \newcommand{\kernel}{\mathrm{null}\,}\)
Multiple Choice
1. b
3. d
5. c
7. a
9. c
11. c
13. b
15. d
17. b
19. a
21. a
23. a
Fill in the Blank
1. pheromones
3. Taste cells
5. olfactory epithelium