The answer should be oxygen
The soil of Antarctica has little organic content because it is permafrost. This means that the soil is always frozen because of very cold temperatures. Because of this, usually, little-to-no plants or animals can live in it.
The answer is stroke. This means that formation of plaque in the blood vessels that serve the brain cause thickenning of the inner walls of the vessels. When the plaque ruptures, a blood clot forms and blocks blood passage to a particular region of the brain served by the vessel. This stifles oxygen supply to the respective part of the brain leading to the death of the cells in the region.
Asexual <span> most of these are also capable of </span>sexual <span>reproduction</span>
