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Charles Macintosh (29 December 1766 – 25 July 1843) was a Scottish chemist and inventor of waterproof fabrics.He devoted all his spare time to science, particularly chemistry, and before he was twenty resigned his clerkship to take up the manufacture of chemicals. In this he was highly successful, inventing various new processes. His experiments with one of the by-products of tar, naphtha, led to his invention of waterproof fabrics.

The receptor molecules, which receive signals from outside the cell, passing the signal to the inside.

In order for a nerve cell, or any cell, to perceive its environment, it needs a sensory apparatus. And for an individual cell, most of that sensation is derived at the cell surface. So, it expresses on its cell surface proteins that span across the membrane.

In the outside world, these proteins can act to receive signals, catching molecules on the outside and then as the molecule passes to the inside of the cell, they can send signals like alarm signals that can tell the cell that a particular molecule is outside.

Hence, here B is the receptor cell.

The two most widely recognized tools used to influence a Nation's Economic activity are Monetary policy and Fiscal policy.

• Monetary policy is primarily concerned with the management of interest rates and the total supply of money in circulation and is generally carried out by central banks

• Fiscal policy is the collective term for the taxing and spending actions of governments.

Okhla Bird Sanctuary is located in Uttar Pradesh.

Okhla Bird Sanctuary is a bird sanctuary at the Okhla barrage over Yamuna River. It is situated in Noida, Gautam Buddh Nagar district, on Delhi-Uttar Pradesh state border and known as a haven for over 300 bird species.

87-year old renowned director Kasinadhuni Viswanath was on 24 April 2017 named for the prestigious Dada Saheb Phalke award for outstanding contribution to the film industry. He is a celebrated filmmaker in Telugu film industry but has also been active in Tamil and Hindi cinema.

– He is known for making films on content-driven stories that have revolved around social themes like disability, untouchability and the evils of dowry.

– He becomes the 48th recipient of the award, the highest recognition in Indian cinema, which consists of a golden lotus, a cash prize of Rs. 10 lakhs and a shawl.

– The recipient of five National Film Awards, Viswanath is known for his movies — “Sankarabharanam”, “Sagara Sangamam” (starring Kamal Haasan and Jayaprada), “Swati Mutyam”, “Saptapadi”, “Kaamchor”, “Sanjog” and “Jaag Utha Insaan” among others.