Darwin, Charles: English naturalist (1809-82), considered the father of evolution. Darwin voyaged aboard the Beagle to see the wonders of South America. After his return to England, he proposed a mechanism for evolution — natural selection.
Darwin noted that successful species produce more offspring in each generation than are needed to replace the adults who die. Not all offspring survive. Some creatures or plants struggle to survive. Many things affect an individual’s chances of survival, including its ability to obtain enough food and avoid being killed. Sometimes there are differences which may make it easier for an individual to survive long enough to reproduce. The species would thus have changed or evolved to favor traits that favor survival and reproduction. Darwin called this process “natural selection”, as explained in his book “On the Origin of Species” in 1859.
- DASH diet
“Use the Dietary Approaches to Stop Hypertension (DASH) eating plan as a guide. DASH encourages you to eat more fresh fruits, vegetables and low fat dairy products, and to limit saturated fat and salt. The DASH eating plan can help you lose weight and maintain a healthier body. In fact, according to the report, sticking […]
Data: Facts, statistics, and the like. In medicine and the health sciences, people often speak of “the data” erroneously in the singular. “Data” is a plural noun and takes a plural verb, as in “the data are very convincing.” It comes from the Latin “datum”, meaning “a thing given.” For the Romans data were surely […]
- Date rape
Date rape: Rape of a woman by a man with whom she is acquainted. The rapist is usually the woman’s “date” (escort). Although there are many possible date rape scenarios, in a common one, the man tries to weaken the resistance of the female by exerting undue psychological pressure upon her or by plying her […]
- Date, expiration
Date, expiration: The date for a drug estimated for its shelf life with proper storage in sealed containers away from harmful and variable factors like heat and humidity. The expiration date of a medicine is based on data, called accelerated stability data, from testing by the manufacturer, that show the product will be good for […]
Daughter: 1. A female offspring. 2. A female adopted child. 3. A product of radioactive decay. 4. A cell resulting from cell division.