61. The biological decomposition of organic substances in wastes under controlled conditions known as
| Answer : Option D |
| Explanation : |
| composting.composting |
62. Of all micro-organisms, the most adaptable & versatile are
| Answer : Option D |
| Explanation : |
| Viruses.The viruses are adaptable & versatile with many variations worldwide & they reproduce within the cells of the immune system of infected people. Versatility is distinctive abilities & skills in productively managing a variety of situations. So virus collections are indispensable instruments in the development of a vaccine. Adaptability is the amount of flexibility & versatility an individual has developed to respond to changing interpersonal situations & environmental requirements. |
64. Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in
| Answer : Option D |
| Explanation : |
| Convection.The process of heat transfer from one place to another place without the movement of particles is called conduction Example:Heat transfer through Metal rods. The fluids (liquids & gases) are heated by this process. On the contrary, convection is the process by which heat is transmitted through a substance from a point to another due to the bodily motion of the heated particles of the substance. |
66. In a food chain, the solar energy utilized by plants is only
| Answer : Option A |
| Explanation : |
| 0..1 per cent 1 percent of the solar energy reaching Earth. Plants, on average, capture only about 0. However, it does not mean that the other 99.9 percent is a 'vast untapped reservoir' awaiting man's exploitation. All biological systems, including crops, follow the 2nd law of thermodynamics when solar energy (a highenergy form) is converted into chemical energy. Plants utilize this chemical energy in the process of building their own tissue. Some of the energy being changed from light to chemical energy is lost as heat that dissipates into the surrounding environment. In agricultural ecosystems, an estimated 15 million kcal of solar energy (net production) is fixed per ha per crop season. Even so, this amounts to only about 0.1 percent of the total solar energy reaching each ha during the yr & equals about 3500 kg/ha of dry biomass. The amount of biomass varies with the crop & ranges from 200 kg/ha for low production crops under arid conditions to 15,000 kg/ha for corn & sugarcane. |
67. Mushroom cultivation is not useful in
| Answer : Option B |
| Explanation : |
| Biological control of crop diseases.Mushroom cultivation has been found to coincide with decrease of incidents of breast cancer. Spent residues after cultivation could be a better source of bio- logically pretreated substrates for biogas production; & agricultural waste recycling can be attained through controlled cultivation of mushrooms. |
68. 'Slipper animalcule' is the common name for:
| Answer : Option D |
| Explanation : |
| Paramecium.'Animalcule' is a old term for a microorganism; it just means 'small animal'. Other better-known animalcules include: Amoeba, called Proteus animalcule; Noctiluca scintillans, commonly called the 'Sea Sparkles'; Rotifers, called wheel animalcules, etc. A paramecium is shaped somewhat like a slipper (a soft shoe), so it is called the slipper animalcule. |
69. Dormancy period of animals during winter season is called:
| Answer : Option B |
| Explanation : |
| Hibernation.Hibernation is a state of inactivity & metabolic depression in endotherms. Often related with cold temperatures, the purpose of hibernation is to conserve energy during a period when sufficient food is scarce. Hibernation refers to a season of heterothermy that is characterized by low body temperature, slow breathing & heart rate, & low metabolic rate. |
70. White blood corpuscles in the human body have a diameter of approximately
| Answer : Option D |
| Explanation : |
71. A man receives his X-chromosome from
| Answer : Option A |
| Explanation : |
72. Total number of muscles present in our body is:
| Answer : Option A |
| Explanation : |
| 656.The number of muscles in the human body varies from about 656 to 850 (sometimes from 639 to around 800). The difficulty lies partly in the fact that different sources group the muscles differently & partly in that some muscles, such as palmaris longus, are not always present. An exact number is difficult to define. |
73. Jaundice is a disease which affects
| Answer : Option C |
| Explanation : |
| Liver.Jaundice is a yellow discoloration of the skin, mucous membranes, & the whites of the eyes caused by increased amounts of bilirubin in the blood. It is often seen in liver disease such as hepatitis or liver cancer. |
74. From which one of the following is quinine extracted -
| Answer : Option A |
| Explanation : |
| Cinchona.Quinine, as a component of the bark of the cinchona tree, was used to treat malaria from as early as the 1600s. The bark of trees in this genus is the source of a variety of alkaloids, the most familiar of which is quinine, an antipyretic (anti-fever) agent. |
75. Anglo-Nubian is a breed of:
| Answer : Option B |
| Explanation : |
| goat.The Anglo-Nubian, or simply Nubian in the United States, is a breed of domestic goat. Its distinguishing characteristics include large, pendulous ears & a 'Roman' nose. The breed was developed in Great Britain of native milking stock & goats from the Middle East & North Africa. Due to their Middle-Eastern heritage, Anglo-Nubians can live in very hot climates & have a longer breeding season than other dairy goats. Considered a dairy or dual-purpose breed, Anglo-Nubians are known for the high butterfat content of their milk, although on average, the breed produces less milk than other dairy breeds. |
Sponsored Links
ssc online
Todaysprint