Low blood oxygen, known as hypoxemia, means that the level of oxygen in the blood has fallen below normal levels, due to one or more of many different causes. Under most circumstances, breathing room air, normal readings range from 95 to 100 percent.ow blood oxygen, known as hypoxemia, means that the level of oxygen in the blood has fallen below normal levels, due to one or more of many different causes. Under most circumstances, breathing room air, normal readings range from 95 to 100 percent.
Which biome is characterized by very low temperatures, little precipitation, and permafrost? Tundra, Which two biomes have the least amount of precipitation? Desert and tundra: A biome is identified by its particular set of abiotic factors and its ___. characteristic plant and animal communities Palm trees and shrubs around a small pool of water in the middle of a barren desert is an example of ____.
Freshwater biomes contain 3% of all the water on Earth. All freshwater biomes contain less than 1% salt. These biomes' wildlife are in danger because of pollution. Estuaries are transition areas where freshwater and marine biomes meet.he Freshwater Biome is made up of rivers, lakes, ponds, and streams. This aquatic biome does not have salt, unlike the Marine biome. This biome is inside continents, never outside because it would mix with the salty ocean.