as the amount of radiation received is proportional to 1/d^2
2m from source
for 1m readings are 50 count per minute
for 2m = 50 / (2)^2
50 / 4 = 12.5 count per minute
Number one may be electrons, protons, and neutrons.
number two may be protons and neutrons.
Answer:
the stem, but if its more specific xylem cells
