If you know that you are not pregnant, how long is too long before you should be alarmed if you don't have your period? What could be the possible reasons for a delayed period?
WEATHER: The tundra is the coldest and the driest of all the biomes on Earth. There is very little rainfall in the tundra; it rains less than ten inches a year. Winters here are long, and summers short, sometimes they last for only 6 - 10 weeks. In the winter the temperature can reach -50Â°F (-45.5Â°C).
Cold deserts have long winters and cold temperatures. The tundra is cold with permafrost soil, which is not hospitable to plant life. The Arctic tundra is near the North Pole, and alpine tundra is comprised of mountainous areas located above the tree line.