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SLV that stands for Satellite Launch Vehicle, was a project started by the Indian Space Research Organisation (ISRO) and was headed by APJ Abdul Kalam in the early 1970s, to develop the technology needed to launch satellites. 

PSLV (which stands for Polar Satellite Launch Vehicle), GSLV (which stands for Geosynchronous Satellite Launch Vehicle) and ASLV (Augmented Satellite Launch Vehicle) are expendable satellite launch systems operated by the Indian Space Research Organisation (ISRO). The difference between all three systems lies in the difference in their payload capabilities. For example: In case of ASLV  with vehicle weight of 41 tons, can launch payloads of 150 kgs into space upto an orbit of 400 kms. While in case of PSLV with vehicle load about 295-320 tons, can launch payloads upto 1678 kgs in sun synchronous orbit of 622 kms. And in GSLV with vehicle weight of 415 tons, can carry upto 5000 kgs in orbits of 550 kms. 

Sriharikota is the ideal rocket launching site of ISRO.

The full form of PSLV is Polar Satellite Launch Vehicle

Earth rotates eastward around its own axis in prograde motion. 

Tilling is a process of preparation of the agricultural soil by mechanical agitation of the soil by digging, stirring, and overturning.

The crops grown between October-March are called Rabi crops. Examples of  rabi crops include wheat, barley, oats (cereals), chickpea/gram (pulses), linseed, mustard(oilseeds) etc

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Anthrax is an infection caused by bacterium Bacillus anthracis. It affects both humans and cattle.

Macrophages  is capable of digesting any microorganism (except virses) that enters the cell.

Lysosomes are formed from the Golgi bodies and peroxisomes are derived from the Endoplasmic reticulum.