Answer: B) chitin Explanation: Many carbohydrates contain one or more modified monosaccharide units that have had one or more groups replaced or removed.   Chitin is one of many naturally occurring polymers. It is one of the most abundant natural materials in the world. Over time it is bio-degradable in the natural environment. Its breakdown may be catalyzed by enzymes called chitinases, secreted by microorganisms such as bacteria and fungi, and produced by some plants.   Chitin is composed of repeating units of N-acetylglucosamine, a nitrogen-containing form of glucose.

Answer: B) Rudra Explanation:

Answer: A) 6000 BC Explanation: Settled agriculture was first seen in China around 6000 BC. The crops grown at this time were rice and millet.Beginning in about 618 BC with classical millet agriculture, China's development of farming over the course of its history has played a key role in supporting the growth of what is now the largest population in the world.

Answer: C) the finance ministers of US, UK, France, Germany, Italy, Canada and Japan Explanation: The finance ministers of US, UK, France, Germany, Italy, Canada and Japan is called as G-7 group.

Answer: A) as the price increases, the quantity demanded will decrease. Explanation:

Answer: C) 21 Explanation: A prime number is a whole number greater than 1 whose only factors are 1 and itself.   Factors of 5 are 1, 5 Factors of 11 are 1, 11 Factors of 21 are 1, 3, 7, 21 Factors of 37 are 1, 37.   Hence, according to the definition of a prime number, 21 is not a prime number as it has more than two factors.

Answer: A) Horse Explanation: Except Horse, remaining all belong to female category. Hind - Female Deer Ewe - Female Sheep Bitch - Female Dog.

Answer: C) Siva Samudram in Karnataka Explanation: Siva Samudram in Karnatka. The potential for hydroelectric power in India is one of the greatest in the world.   The first hydro-electric power station in India was established in Karnataka at "shivana samudra".