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A variety of living things serve as models in biological research, such as in genetics, and in drug testing. Until the 19th century, plants yielded most of the medicinal drugs in common use, as described in the 1st century by Dioscorides. Plants are the source of many psychoactive drugs, some such as coca known to have been used for thousands ...
Water resources are natural resources of water that are potentially useful for humans, for example as a source of drinking water supply or irrigation water. These resources can be either freshwater from natural sources, or water produced artificially from other sources, such as from reclaimed water or desalinated water (). 97% of the water on Earth is salt water and only three percent is fresh ...
There are three basic types of freshwater ecosystems: Lentic (slow moving water, including pools, ponds, and lakes), lotic (faster moving water, for example streams and rivers) and wetlands (areas where the soil is saturated or inundated for at least part of the time). Limnology (and its branch freshwater biology) is a study about freshwater ...
He found that plants in less-pure water sources grew better than plants in distilled water. By 1842, a list of nine elements believed to be essential for plant growth had been compiled, and the discoveries of German botanists Julius von Sachs and Wilhelm Knop, in the years 1859–1875, resulted in a development of the technique of soilless ...
Ornamental plants give millions of people pleasure through gardening, and floriculture is a popular pastime among many. Viticulture and winemaking can provide both culinary and economic values to society. In art, mythology, religion, literature and film, plants play important roles, symbolising themes such as fertility, growth, purity, and rebirth.
A ton of ordinary situations may be affecting your health without you even realizing it. So here’s a helpful heads up on some stuff to watch out for
“The two things in older adults that we see as a result of aging that lead to decreases in their quality of life are changes in cognition, and functionality, staying up on your feet.
It was built in Lübeck, Germany in 1968, and was the first of its kind in the world built for use in colder waters. [28] The 14 meter long, 7 meter diameter UWL allowed divers to spend several weeks under water using saturation diving techniques. The scientists and technicians would live and work in the laboratory, returning to it after every ...