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Chalisa is group of 40 turkish nobles very close to the ruler. This group of nobles was particularly formed to suppress the other nobles who might revolt against the emperor. In Indian medieval history the term was introduced and  founded by a Turkish emperor, Muhammad Ghori who is popularly known as the greatest slave emperor in the Medieval India. It is also known as Turkan-i-Chahalgani. It's a kind of secret agency of nobles that work inside out to put other nobles under control. Amongst the 40 members of the Turkan-i-Chahalgani or Chalisa, Balban was one of them. Balban later on seized power and became the emperor himself.

Cash crops are crops that are cultivated for selling to get money. Banana, mango, oranges, tea, turmeric, ginger, tomato etc are cultivated mostly to sell to get money in return from its sale. Hence the term is use to indicate the activity of cash gained after the crops.

Nothing in nature is incomplete. But botanist of people study plants would not agree that way. They would refer those plants whose flower bears both androecium and gynoecium in a single flower. see: typical flower

Cryptogams are plants that never produce flowers . Cryptogamae is a subdivision of the kingdom Plantae. It has further subdivided into Thallophyte , Bryophyte and Pteridophyte . Cryptogamic plants are also called the lower plants .

Cone is a three dimensional shape that is fairly wide in one end but the opposite end is tapering to make pointed tip. It looks like the rounded pyramid. It is similar to the shape of a typical carrot. Rounded and thick at one end but slowly becomes pointed at the other end. In plant the botanists would refer cone to the false fruits of pines. See gymnosperm  

The conditions of the atmosphere of the environment of a place for long duration of time. The conditions of weather every day is sumed up for a minimum 35 years period. The average weather conditions of at least 35 years can be termed as climate . If you say the climate of Cherrapunji is pleasant. You actually take the general feel of a place into account. You ignore the experience of the unpredictable weather conditions of days or weeks.