Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
Your heart beats over 36 million times a year.
Did you know?
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.
Biomagnification in a Lake Ontario food chain.
Palpation of Lymph Nodes, Anterior Cervical Chain
Water chain in cytochrome f
Diagram of the food chain
(a) Uranium series dating uses the decay chain of radioactive uranium to stable lead.