The answer to this question would be: necrosis
Necrosis is the death of cell caused by various injury, one of them is oxygen starvation. Cells need a constant supply of energy to sustain its life. Without oxygen, the energy produced by cells will be decreased. When the energy is depleted, the cell will not be able to use ion pumps or any organelle that need energy. This will slowly damage the cell until it dies.
The answer would be cytotoxic cells.
If there are no rocks in a desert then the prey would rapidly decrease due to no rocks for shelter or hiding, once they do food will be scarce for the predators causing the predator population to also decrease meaning that the life in the desert will decrease by 80%, leaving barely any wildlife left.
Testosterone and serotonin are the two hormones consistently related to high levels of aggression.
