Lotus (genus)

Lotus, derived from lota (a small, usually spherical water vessel of brass, copper or plastic used in parts of South Asia), is agenus that included bird's-foot trefoils (also known as bacon-and-eggs^[1]) and deervetches^[2] and contains many dozens of species distributed world-wide. Depending on the taxonomic authority, roughly between 70 and 150 are accepted. Lotus is a genus of legume and its members are adapted to a wide range of habitats, from coastal environments to high altitudes. Most species have leaves with five leaflets; two of these are at the extreme base of the leaf, with the other three at the tip of a naked midrib. This gives the appearance of a pair of large stipules below a "petiole" bearing a trefoil of three leaflets – in fact, the true stipules are minute, soon falling or withering.^[3] Some species have pinnate leaves with up to 15 leaflets. Theflowers are in clusters of three to ten together at the apex of a stem with some basal leafy bracts; they are pea-flower shaped, usually vivid yellow, but occasionally orange or red. The seeds develop in three or four straight, strongly diverging pods, which together make a shape reminiscent of the diverging toes of a small bird, leading to the common name "bird's-foot".

Hydrilla

Hydrilla (Esthwaite Waterweed, waterthyme or hydrilla) is a genus of aquatic plant, usually treated as containing just one species, Hydrilla verticillata, though some botanists divide it into several species. It is native to the cool and warm waters of the Old World in Asia, Europe, Africa and Australia, with a sparse, scattered distribution; in Europe, it is reported from Ireland, Great Britain, Germany, and the Baltic States, and in Australia from Northern Territory, Queensland, and New South Wales.^[1][2][3]

The stems grow up to 1–2 m long. The leaves are arranged in whorls of two to eight around the stem, each leaf 5–20 mm long and 0.7–2 mm broad, with serrations or small spines along the leaf margins; the leaf midrib is often reddish when fresh. It is monoecious (sometimes dioecious), with male and female flowers produced separately on a single plant; the flowers are small, with three sepals and three petals, the petals 3–5 mm long, transparent with red streaks. It reproduces primarilyvegetatively by fragmentation and by rhizomes and turions (overwintering), and flowers are rarely seen.^[2][4][5][6] They have air spaces to keep them upright.

Lithops

Lithops is a genus of succulent plants in the ice plant family, Aizoaceae. Members of the genus are native to southern Africa. The name is derived from the Ancient Greek words λίθος (lithos), meaning "stone," and ὄψ (ops), meaning "face," referring to the stone-like appearance of the plants. They avoid being eaten by blending in with surrounding rocks and are often known as pebble plants or living stones. The formation of the name from the Greek "-ops" means that even a single plant is called a Lithops.

Aloe vera

Aloe vera (/ˈæloʊiː/ or /ˈæloʊ/) is a succulent plant species of the genus Aloe. It grows wild in tropical climates around the world and is cultivated for agricultural and medicinal uses. Aloe also is used for decorative purposes and grows successfully indoors as a potted plant.^[3]

The cosmetic and medicinal value of the plant is debated. It is found in many consumer products.

World War II

World War II (WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. In a state of "total war", the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources. Marked by mass deaths of civilians, including the Holocaust (in which approximately 11 million people were killed)^[1][2] and the strategic bombing of industrial and population centres (in which approximately one million were killed, and which included the atomic bombings of Hiroshima and Nagasaki),^[3] it resulted in an estimated 50 million to 85 million fatalities. These made World War II the deadliest conflict in human history.^[4]

World War I

World War I (WWI or WW1), also known as the First World War, or the Great War, was a global warcentred in Europe that began on 28 July 1914 and lasted until 11 November 1918. More than 70 millionmilitary personnel, including 60 million Europeans, were mobilised in one of the largest wars in history.^[5][6]Over 9 million combatants and 7 million civilians died as a result of the war (including the victims of anumber of genocides), a casualty rate exacerbated by the belligerents' technological and industrial sophistication, and the tactical stalemate caused by trench warfare, a grueling form of warfare in which the defender held the advantage. It was one of the deadliest conflicts in history, and paved the way for major political changes, including revolutions in many of the nations involved.^[7]

నీరు ప్రాముక్యత

నీరు, ఉదకం లేదా జలము (సాంకేతిక నామం H₂O) జీవులన్నింటికి అత్యవసర పదార్ధం. భూమిమీద వృక్షాలు, జంతువులు, మానవాళి మనుగడకు, వాటి పెరుగుదలకు గాలి తరువాత ముఖ్యమైనది నీరు. గ్రామాల్లో, పట్టణాల్లో నివసించే కోట్లాది ప్రజలకు త్రాగునీరు సరఫరా చేయడం ఎన్నో ప్రపంచదేశాలు ఎదుర్కొంటున్న అతిపెద్ద సమస్య. వివిధ పంటల సాగుబడికి నీటి-పారుదల సౌకర్యాలు అత్యంత అవసరమైనవి. ఏ పరిశ్రమ కూడా తగినంత నీటి సరఫరా లేకపోతే స్థాపించడంగాని, నడపడంగాని సాధ్యపడదు. ఇది ప్రకృతి సమస్త జీవులకు ప్రసాదించిన ఒక అపరూపమైన పదార్థము: నీరు ప్రకృతిలో ఉన్న సమస్త జీవులకు ప్రాణాధారము. ప్రప్రధమ జీవి పుట్టుక నీటినోనె జరిగినది. నీరు ఈ భూమండలంపే 71 శాతానికి పైగా ఆవరించి యున్నది. ఈ భూమి పై నీరు మూడు రూపములలో వున్నది. 1. ఘన రూపము. అనగా మంచు గడ్డల రూపంలోను, (గ్లేసియర్స్), (మంచు కొండలు) 2. ద్రవ రూపం ( సముద్రాలు, నదులు, తటాకములు మొదలగునవి) వాయు రూపంలో ( మేఘాలు, ఆవిరి