ஆந்திரா மாநிலம் - ஒரு பார்வை

Raja raja narendrudu

An sculpture of Raja raja narendrudu (AD 1022-1063) whho rules Rajhamundry. The city of Asia's second largest Twin bridege (road and train trasport)

India 1909

it is the map of INDIA 1909 during british govt

Lichens - Just to know

Lichens (pronounced /ˈlaɪkən/,[1] sometimes /ˈlɪtʃən/[2]) are composite organisms consisting of a symbiotic association of a fungus (the mycobiont) with a photosynthetic partner (the photobiont or phycobiont), usually either a green alga (commonly Trebouxia) or cyanobacterium (commonly Nostoc).[3] The morphology, physiology and biochemistry of lichens are very different from those of the isolated fungus and alga in culture. Lichens occur in some of the most extreme environments on Earth—arctic tundra, hot deserts, rocky coasts and toxic slag heaps. However, they are also abundant as epiphytes on leaves and branches in rain forests and temperate woodland, on bare rock, including walls and gravestones and on exposed soil surfaces (e.g. Collema) in otherwise mesic habitats. Lichens are widespread and may be long-lived;[4] however, many species are also vulnerable to environmental disturbance, and may be useful to scientists in assessing the effects of air pollution,[5][6][7] ozone depletion, and metal contamination. Lichens have also been used in making dyes and perfumes, as well as in traditional medicines.