Last seen: May 1, 2022
Correct answer: (b) re-radiation of I.R. rays by CO2 and H2O.
Correct answer: (c) (ii) and (iv) Explanation: CO and oxides of Nitrogen are poisonous gases present in automobile exhaust gases.
Correct answer: (c) SO2 and NO2 Explanation: SO2 and NO2 are responsible for the discoloured and lustureless nature of marble.
Correct answer: (b) I and II Explanation: Pesticides and synthetic fertilizers pollute the soil.
Correct answer: (a) methemoglobinemia Explanation: Excessive concentration of nitrate in drinking water is harmful and can cause methemoglobinemia...
Correct answer: (c) Freons, chlorofluorocarbons, are inert. Chemically, they do not react with ozone in stratosphere. Explanation: Freons and chlo...
Correct answer: (b) methane and CO2 in atmosphere. Explanation: The main gas responsible for the global warming is carbon dioxide. Other contribut...
Correct answer: (c) Microorganisms present in the soil Explanation: CO is converted into CO2 by microorganism present in soil.
Correct answer: (a) London smog is oxidising in nature Explanation: London smog is reducing in nature.
Correct answer: (b) I3 Explanation: Iodine is essential for thyroid gland.
Correct answer: (c) Somatostatin Explanation: Hypothalamus produces two kinds of hormones: releasing hormone and inhibiting hormones. GnRH is rele...
Correct answer: (a) melatonin Explanation: Pineal gland secretes melatonin. It plays a very important role in the regulation of a 24-hour (diu...
Correct answer: (c) Cretinism
Correct answer: (d) Myxedema
Correct answer: (a) progesterone Explanation: After ovulation, ruptured follicle gets converted to corpus luteum which secretes progesterone.
Correct answer: (c) increasing blood calcium levels Explanation: This is called so because PTH stimulates the reabsorption of calcium by the renal...
Correct answer: (a) 1-C, 2-D, 3-B, 4-A Explanation: Column I shows the names of hormones and column II shows the functions of the hormones.
Correct answer: (c) Decreased thyroid function
Correct answer: (b) Exocrine glands are ductless glands. Explanation: Endocrine glands lacks ducts and are called as ductless glands.
Correct answer: (c) Androgens