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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
![The sexual cycle of flowering plants involves alternation of sporophyte and gametophyte generations.](https://biology-forums.com/gallery/47/medium_33_24_07_11_10_29_04.jpeg)
![Earth’s history spans 4.5 billion years. Geologists and paleontologists have pieced together the his](https://biology-forums.com/gallery/47/medium_274477_04_02_15_12_24_30_2057231.jpeg)