The answer is symplastic transport. Transport of phytohormones
such as cytokinins occurs through cytoplasm
from cell
to cell through plasmodesmata. Cytokinins travel up
the xylem and promote lateral growth. Gaseous molecules, such as
ethylene, emitted and received by plants must pass the apoplast.
Deadly particles like SO2 that comes into contact with the air will form air pollution. This deadly particles will then form acid rain. When those rain comes into contact with water supply, they turn the water acidic. They will cause river to be too acidic for fishes and other living organisms to survive.
10 km = 10 × 1000 m = 10 000 m
10 000 m = 10 000 × 1000 mm = 10 000 000 mm
I think its the mitochondria in the cell...
