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Wolffia is a genus of aquatic plants with a cosmopolitan distribution. [1] They include the smallest flowering plants on Earth. [2] Commonly called watermeal or duckweed, [3][4] these aquatic plants resemble specks of cornmeal floating on the water. They often float together in pairs or form floating mats with related plants, such as Lemna and ...
Water covers about 71% of the Earth's surface, with seas and oceans making up most of the water volume (about 96.5%). [22] Small portions of water occur as groundwater (1.7%), in the glaciers and the ice caps of Antarctica and Greenland (1.7%), and in the air as vapor, clouds (consisting of ice and liquid water suspended in air), and ...
The total volume of water on Earth is estimated at 1.386 billion km 3 (333 million cubic miles), with 97.5% being salt water and 2.5% being freshwater. Of the freshwater, only 0.3% is in liquid form on the surface. [2][3][4] Because the oceans that cover roughly 70.8% of the area of Earth reflect blue light, Earth appears blue from space, and ...
Water is the chemical substance with chemical formula H 2 O; one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom. [25] Water is a tasteless, odorless liquid at ambient temperature and pressure. Liquid water has weak absorption bands at wavelengths of around 750 nm which cause it to appear to have a blue color. [3]
Tardigrade. Tardigrades (/ ˈtɑːrdɪɡreɪdz /), [1] known colloquially as water bears or moss piglets, [2][3][4][5] are a phylum of eight-legged segmented micro-animals. [2][6] They were first described by the German zoologist Johann August Ephraim Goeze in 1773, who called them Kleiner Wasserbär ('little water bear'). [7]
a small accumulation of water on a surface, usually the ground. Reflecting pool: a water feature usually consisting of a shallow pool of water, undisturbed by fountain jets, for a reflective surface. Reservoir: a place to store water for various uses, especially drinking water, which can be a natural or artificial (see lake and impoundment). Rill
Wolffia globosa is a species of flowering plant known by the common names Asian watermeal and duckweed. It is native to Asia and is found in parts of the Americas and Africa, where it is an introduced species. [2] It grows in mats on the surface of calm, freshwater bodies, such as ponds, lakes, and marshes.
The smallest penguin species is the little blue penguin (Eudyptula minor), which stands around 30–33 cm (12–13 in) tall and weighs 1.2–1.3 kg (2.6–2.9 lb). [68] The smallest bird of prey is the Black-thighed falconet (Microhierax fringillarius), with a wingspan of 27–32 centimetres (11–13 in), roughly the size of a sparrow. [69]