71. A biogeochemical cycle is the A. Cycling of energy through the biosphere B. A part of pollution meat must plats C. Global meteorological cycles D. Cycling of elements through the biotic and abiotic sphere Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
72. Species diversity is generally higher in ecosystem experiencing A. No disturbance B. Moderate disturbance C. High disturbance D. Drastic disturbance Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
73. Photovoltaics (solar cells) work on the principle of A. Raman effect B. Zeeman effect C. Photoelectric effect D. Faraday effect Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
74. Which of this remote sensing tool is commonly used for groundwater exploration and soil moisture determination? A. Colour composite imageries B. Band 5 spectra C. Infra-red spectra D. Black and white aerial photos Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
75. One of the purpose of secondary treatment of industrial waste water and sewage is to A. Increase the chlorine content B. Reduce the BOD C. Encourage the formation of PCBs D. Discharge ammonification Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
76. The disinfection method by chlorine is most commonly used method, the other method/s is/are A. Ozonation B. Irradiation ultraviolet light C. Both A and B D. Hydrogenation Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
77. The presence of CO2 in biogas A. Increases its calorific value B. Makes it liquid C. Does not influence its calorific value D. Decreases its calorific value Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
78. Bioremediation of organic wastes is generally based on which of the following? A. Bacteria B. Animal species C. Plant species D. Both A and B Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
79. Which of the following is for rhizosphere? A. Region where soil and roots make contact B. Apical part of root C. Epidermal part of the root D. Root hairs Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
80. Which of the following is being used to produce "super bioabsorbent", a polysaccharide which is composed of glucose and glucuronic acid? A. Alcaligenes luteus B. Pseudomonas putida C. Thermus aquaticus D. Penicillium notatum Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
