The distance around a circle is called as Circumference. And that in the case of square or rectangle it is called as Perimeter.

Answer: B) Plant ----> Animal ----> Atmosphere Explanation: During daylight hours, plants capture carbon dioxide from the atmosphere and use it to make carbohydrates which is stored as starch in the plant. Animals feed on the plants and extract the carbohydrates through their digestive system. The carbohydrates, namely glucose, are used by the animals for production of ATP through cellular respiration.   Cellar respiration in the animals produces carbon dioxide as a waste product. The carbon dioxide is released into the atmosphere, from where it is again captured by plants and the cycle is repeated.   Hence, option B) Plant ----> Animal ----> Atmosphere is the path possible in carbon cycle.

Answer: C) 10 Explanation: Adding the corresponding numbers in first and last figures gives the corresponding number in the middle figure. i.e, 4 + 3 = 7 13 + 2 = 15 2 + 4 = 6 9 + 1 = 10

Answer: B) Dry Ice Explanation: Dry ice or Cardice is the solid form of Carbon dioxide.   1. It has an advantage of lower temperature than the water ice and doesn't leave any residue.   2. The reason why it is called as Dry ice is because unlike the normal ice, it won't melt into liquid form. It directly evaporates into the air as gas. That is Solid to gas form passing through liquid state is a phenomenon called as Sublimation.   3. The primary use of dry ice is as cooling agent.

Answer: D) Both A & B Explanation:

Answer: B) Sina weibo Explanation:

Answer: A) P V Sindhu Explanation: Indian Olympic Association (IOA) chooses P.V. Sindhu as the flag-bearer of the Indian contingent for the opening ceremony of the Gold Coast Commonwealth Games. The opening ceremony will be held on April 4, 2018.

Answer: B) Cytoplasm Explanation: Glycolysis is the first step of cellular respiration. This process breaks down glucose into two pyruvic acids, and produces 2 ATP and 2 NADH.  In eukaryotic cells, glycolysis and fermentation reactions occur in the cytoplasm.