12 NCERT BIOLOGY MCQ

Q1. In a coal-fired power plant, electrostatic precipitators are installed to control the emission of NO x SPM CO SO 2 Solution Electrostatic precipitators are widely used in power plants to remove 99% of suspended particulate matter (SPM) present in the industrial and thermal power exhausts. Q2. On a global scale, which country has the highest loss of top soil? China England Italy India Solution On a global scale, the loss of top soil is maximum (...

Q1. Which one is hotspot of bio-diversity? Eastern Ghats Western Ghats Aravalli Hills Indogangetic Solution In India, there are three hot spots- Indo Burma, Himalayas and Western Ghats. Western Ghats is spread over 1600 km that contains tropical evergreen rainforests. It has a wide range of endemic species as well as richness of richness of species of flowering plants, amphibians, reptiles. Q2. The species becomes extinct most easily by: Urbanization Heavy rains Deforestation Sliding o...

Q1. The ‘10 Percent Law’ is related to Mendelian genetics Non-Mendelian genetics Energy transfer from a lower trophic level to a higher trophic level Energy consumption during photosynthesis in C 4 plants Solution The ‘10 Percent Law’ implies that exactly 90% of the energy is lost in the transfer at each trophic level, and that only 10% is passed on as biological energy. According to this law, during the transfer of energy from organic food from one trophic level to the next, only 10% of energy from organic matter is stored as flesh. The remaining is lost during transfer, broken down in respiration or lost to incomplete digestion by higher trophic levels. Q2. The loss of energy as one proceeds from one trophic level to th...