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.

ALPHABET is the only has the most letters in it.   Alphabet has all the 26 letters from A - Z.    Hence, ALPHABET is one word that has the most letters in it.

A Paper.

Answer: C) Science Explanation:

Answer: C) Nuclear Power Plant Explanation: Nuclear Power Plant uses a Non Renewable Energy Source.   Non-renewable energy is that source of energy which can not be used again and again. This sort of energy is sustainable to exhaustion. Non renewable energy is that form of energy which is subject to deletion. This type of energy is of many uses to us. It can be used to produce electricity, heating, cooking, transportation and manufacturing. 85% of the energy used in the industrial processes is form the non-renewable type of energy.

An organelle called Eyespot allows some protists to detect light. It allows the cells to sense light direction and intensity and respond to it by swimming either towards the light (positive phototaxis) or away from the light (negative phototaxis).   Eyespot is a photoreceptive organelle found in the flagellate or (motile) cells of green algae and other unicellular photosynthetic organisms such as euglenids.   Eyespot-mediated light perception helps the cells in finding an environment with optimal light conditions for photosynthesis. Eyespots are the simplest and most common "eyes" found in nature, composed of photoreceptors and areas of bright orange-red pigment granules.

Answer: C) Sol Explanation: Peru is a country in South America. Lima is the capital city of Peru. Sol is the currency of Peru.

Answer: D) 40 Explanation: Present age of Sony = 24 + 4 = 28 years After 5 years Renuka's age = 7×5 + 5 = 40 years