Answer:
it affects the dispersal of other important nutrients in the soil, and an imbalance can block a plant's ability to absorb them.
It prevent
an action potential if it blocks the movement of sodium across the membrane. The
primary feature of a neuron that prevents the action potential from traveling
back from where it just passed is the absolute refractory period. It holds an
action potential if it blocks the movement of sodium across the membrane.
Answer:
15. C
16. C
17. B
18. ?
19.B
20.A
21.B
Hope this helps, sorry I didn't know 18.
