Across
- 4. The type of hypothesis that states there is no difference in variables
- 6. Pores on the underside of a leaf
- 7. The P-value we always use in biology
- 8. The principle given to describe the flow of blood and water in gills
- 9. Rate of diffusion = (surface area x concentration gradient)/distance
- 11. This is the volume of air in one breath
- 12. This is the site of gas exchange in fish
- 13. As volume increases, this always decreases
Down
- 1. Tissue in leaf where the most photosynthesis occurs
- 2. This is the site of gas exchange in animals.
- 3. This muscle contracts and flattens when you inhale.
- 5. Opening on an insect that allow gases to enter and leave
- 8. Impermeable substance that an insect's exoskeleton is made from
- 10. Statistical tests used to compare the difference of mean values.