Daily Quiz: UPSC Prelims Marathon – March 7, 2019

The size of the air bubble increase as its rise from the bottom of the lake to the top due to decrease in hydrostatic pressure.

The genetic engineering approval committee (GEAC) is under the ministry of environment and forests.

Carbon Dioxide and Water are two waste products of aerobic respiration.

Respiration is the process by which people (and other organisms) break down glucose (from sugars and carbohydrates in their food) in order to release energy. This process requires oxygen which we breath in.

Aerobic respiration is respiration that uses oxygen as a reactant. Aerobic respiration is much more efficient, and produces ATP much more quickly, than anaerobic respiration (respiration without oxygen). This is because oxygen is an excellent electron acceptor for the chemical reaction.

“Dieback” refers to the progressive death of twigs and branches which generally starts at the tips. Trees and shrubs affected by the decline and dieback syndrome may die within a year or two after symptoms first appear or in some cases survive indefinitely.

Corrective practices such as proper watering, fertilization, and pruning are not guaranteed solutions in all cases.

Decline and dieback may be caused by many factors and is usually progressive over several years. Trees and shrubs of all ages may be affected, although this disease complex is usually associated with plants that have attained some size and maturity.

Characteristic odour of onion and garlic is due to sulphur compound Ally1 propy1 disulphide in onion and Dially 1 disulphide in garlic

Total internal reflection is an optical phenomenon that happens when a ray of light strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface. If the refractive index is lower on the other side of the boundary, no light can pass through and all light t is reflected. The critical angle is the angle of incidence above which the total internal reflection occurs. Total internal reflection takes place when light travels from optically denser medium to optically rarer medium Refractive index of diamond is very high (2.417) whereas refractive index of glass is only in between (1.5 to 1.6) whereas in rest all options there is no possibility of total internal reflection because refractive index of water (1.33) and air (1,008) is less than refractive index of glass.

Malnutrition defines a condition that occurs when the body is not getting enough nutrients. Whether resulting from an independent or unbalanced diet, digestive or absorption problem or other medical conditions. Overnutrition , under nutrition and imbalanced nutrition are three forms of malnutrition. Protein energy malnutrition PEM leads to two type of disease viz., marasmus and kwashiorkor ‘marasmus’ is a type of pem caused by simultaneous deficiency of protein and total food calories; whereas ‘ kwashiorkor’ is caused by serve protein deficiency.