Lack of genetic diversity in Potato Plants!
It could be the cell membrane which is a barrier, thinner than the cell wall, that protects the cell and controls transport from within and outside the cell.
<span>Tundra and desert are the biomes that receive the least amount of annual precipitation.
Exposure to solar flares is NOT a factor that helps determine the characteristics of a land biome, whereas humidity and latitude can be.</span>
The answer is producers and sunlight. The producers (or plants) are biotic (living) and the sunligjt is abiotic (non living). Hope this helps.