In a mycorrhizal relationship, what benefit does the plant get from the fungus?
a. an energy source
b. aid in seed dispersal
c. products of photosynthesis
d. aid in the absorption of water and minerals

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

i think its white blood cells

i hope this