sodium.
Most cell membranes have a sodium-potassium pump. It is an enzyme that pumps sodium ions out of the cell and potassium ions into the cell. It moves 3 sodium ions out and 2 potassium ions in. Both ions are transported against the concentration gradient. Thus, the sodium-potassium pump provides one positive charge carrier to the extracellular space.
If a forest was burned down, then the fire of course it would be wildfire, spreading everywhere, so just like a power plant and cars have that air pollution that infects the air and makes people sick, the same is with the forest because the fire is burning the grass and the smoke is going up to the atmosphere so its contaminated and is spreading everywhere, so you could say the level of carbon dioxide is infected with smoke and could possibly kill you if inhaled a lot.
leptotene : homologus pairing is formed and chromosomes start to get closer to each other.
zygotene: synapsis is formed between homologus chromosomes which is apoint oattachment.
pachytene:crosing over occer that homologus chromosomes exchange THIER GENETIC METERIALS.
DIPLOTENE: chiasmata formation disapear which was formed in pachytene.
diakinasis:homologus chromosomes start to seperate from each other.