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Author Question: The smallest unit of a(n) ________ is an atom. (Read 32 times) |
Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.