Ch 13 Review answers

.1 nitrate (NO3)

2. facilitated diffusion simple

3. nitrate reductase.

4. cations.

5. biological fixation by bacteria

6 agricultural fertilizer run off.

7increase the availability of nutrients to plants.and. aid in water uptake for plants in arid environments

8.Some members of I are members of II and some are not, and some members of II are members of I and some are not

9. No member of I is also a member of II.

10. I is greater than II

11. resulting in release of NO and N2O which are greenhouse gasses.

12. symbiosome.

13. Rhizobium

14. decompose the organic materials secreted by the plant making the elements available to the plant again.

15. Microbivory

16. aerobic; oxidized

17. Decomposer bacteria are indicated by letter ____ in the diagram below.

18. Nitrogen fixation bacteria are indicated by letter ____ in the diagram below.

19. Denitrification bacteria are indicated by letter ____ in the diagram below.

20. nitrogen cycle

21. actively Because it is being taken up against both the electric field and concentration gradient (electrochemical potential gradient)

22. root density, ion concentration in soil solution, nutrient supply

23.concentration and electric field

24.

25. calcium nitrogen iron

26. denitrification.

27. What are mycorrhizae? Describe the relationship between mycorrhizae and plant roots(one sentence) and how each benefits the other.

28. Describe and illustrate the process by which plants assimilate a generally insoluble form of iron into the root.