71. Estrogen and progesterone control and stimulate the growth of –

1. Pituitary gland
2. Thyroid gland
3. Mammary gland
4. Supra renal gland

Option “3” is correct.
Estrogen and progesterone control and stimulate the growth of Mammary gland.
72. The membrane covering the lungs is a –

1. Pleura
2. Pericardium
3. Peritoneum
4. Mesothelium

Option “1” is correct.
The pleural membrane is thin, moist, slippery and has two layers. The outer, or parietal, pleura lines the inside of the rib cage and the diaphragm while the inner, visceral or pulmonary, layer covers the lungs.
73. Scientific study of birds is known as –

1. Limnology
2. Herpetology
3. Malacology
4. Ornithology

Option “4” is correct.
Ornithology is the scientific study of birds.
74. In a human body, the longest bone is in the –

1. Vertebral column
2. Thigh
3. Rib cage
4. Arm

Option “2” is correct.
Femur or thighbone, is the largest bone in your body.
75. Plants which flower only once in, their life time are known as –

1. Polycarpic
2. Monocarpic
3. Monogamous
4. Monogeneric

Option “2” is correct.
Monocarpic plants are those that flower, set seeds and then die. They flower once in thier lifetime.
76. Which one of the following is a plant hormone?

1. Insulin
2. Thyroxine
3. Estrogen
4. Cytokinin

Option “4” is correct.
The plant hormones are generally classified into five groups,
These are:
(i) Abscisic acid (ii) Auxins
(iii) Cytokinins (iv) Ethylene
(v) Gibberellins
77. Insulin is received from-

1. Rhizome of ginger
2. Roots of dahlia
3. Balsam flower
4. Potatoes tuber

Option “2” is correct.
Insulin is a hormone which plays an important role in the regulation of blood glucose level. The main source in insulin from the roots of dahlias and Beta β-cells of the pancreas.
78. Which one of the following human organs is responsible for detoxification of alcohol?

1. Liver
2. Lung
3. Heart
4. Waist

Option “1” is correct.
The liver is responsible for the detoxification of alcohol. Liver detoxify harmful substances through the complex chemical reactions.
79. The ‘blue baby’ pollution disease is due to the excessive presence of which of the following in drinking water?

1. Fluoride
2. Chloride
3. Nitrate
4. Arsenic

Option “3” is correct.
Blue baby syndrome is an illness that begins when a large amount of nitrates in water are ingested by an infant and converted to nitrite by the digestive system.
80. Karnal Bunt is a disease of:

1. Barley crop
2. Wheat crop
3. Bajra crop
4. Jowar crop

Option “2” is correct.
Karnal Bunt is a fungal disease caused by the smut fungus Tilletia indica. If affects the quality of wheat. It was first reported in 1931, infecting wheat growing near the city of Karnal, Haryana.
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48 thoughts on “Biology”

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