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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

Difficulties in applying the morphological species concept Difficulties in applying the morphological species concept
Extinction and immigration of bird species on the California Channel Islands between 1917 and 1968 ( Extinction and immigration of bird species on the California Channel Islands between 1917 and 1968 (
Invasive species in Canada include (a) zebra mussels, Dreissena polymorpha, (b) sea lamprey, Petromy Invasive species in Canada include (a) zebra mussels, Dreissena polymorpha, (b) sea lamprey, Petromy
The relative influence of heredity and the environment in human behavior has fascinated and plagued ... The relative influence of heredity and the environment in human behavior has fascinated and plagued ...
Annotation of a DNA sequence containing part of the human globin gene Annotation of a DNA sequence containing part of the human globin gene
Proportional Changes During Skull Development: Human vs. Chimpanzee Proportional Changes During Skull Development: Human vs. Chimpanzee
Video: Stomach peristalsis & Enterogastric reflex

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