Answer: B) Respirometer Explanation: A respirometer is a device used to measure the rate of respiration of a living organism by measuring its rate of exchange of oxygen and/or carbon dioxide.

Answer: B) divide Explanation: Here if you observe, add and subtract are opposite in nature. Similarly, mutiply and divide are also opposite in nature.   Hence, Add : Multiply :: Subtract : Divide.

Answer: C) Melbourne Explanation:

Answer: D) Bangalore Explanation:

Answer: D) Sucrose Explanation: Sucrose is not a monosaccharide.   Monosaccharides are simple carbohydrates molecules that cannot be broken down into smaller molecules of other carbohydrates.   Glucose, galactose and fructose are examples of Monosaccharides.

Answer: D) Birds Explanation: Mammals and Birds are Warm-blooded Animals. Warm-blooded animals have body temperatures that usually stay the same Whether it is sunny and hot outside or there is a snowstorm.They are able to regulate their body temperature which changes with temperature of environment.   Warm Blooded Animals :: Apes, Monkeys, Whales, Elephants, Cheetahs, Giraffes, Pets, Felines, Pigs and Humans(all other live birth bearing creatures that nurse their young)..   Cold Blooded Animals :: All Reptiles, Amphibians, Fish as well as Insects (Bugs).

Answer: B) Sun Explanation: The water cycle is a term for the movement of water between the Earth's surface, the sky and underground. Water evaporates due to heat from the sun. Hence, the water cycle is driven primarily by the energy from the sun. This solar energy drives the cycle by evaporating water from the oceans, lakes, rivers, and even the soil. Other water moves from plants to the atmosphere through the process of transpiration.

Answer: B) 15 September Explanation: