Whole human blood has a shelf life of 42 days, but in a 2011 government sponsored national survey, researchers found, an estimated one in 20 units of donated blood was thrown away. The Contact 5 Investigators asked One Blood how that could happen. I don't know about that. I can't comment on that, answered Michaels.
The climate of a tropical rainforest is very hot and wet. The average temperatures of a tropical rainforest are about 80 degrees F all year round with an exception of cool nights. The temperature of the rainforest has never dropped below 64 degrees F. It rains about 160-400 inches each year. In a downpour, only one-third of the rain that falls hits the forest floor.
The tropical rainforest biome is an ecosystem that covers about 7% of the Earthâs surface. They are found all over the world but the majority of the tropical rainforest lies in South America in Brazil.The weather in the tropical rainforest is rainy yet pleasant all year round, day or night.ainforests are extremely important because the water they produce is evaporated and then used as rain in other areas. The average temperature of the tropical rainforest remains between 70 and 85Â° F. The tropical rainforest is very rainy as its name implies. The rainfall can reach up to 400 inches in one year.