761. Which of the following is responsible for transport of food and other substances in plants?
1. Xylem
2. Phloem
3. Chloroplast
4. None of these
Option “2” is correct Phloem is responsible for transport of food and other substances in plants. Xylem transport water and solutes from the roots to the leaves.
762. The famous ‘Bubble Baby Disease’ is so called because:
1. It is caused by water bubble
2. The suffering baby makes bubbles of saliva
3. The suffering baby is treated in a germ-free plastic bubble
4. It is cured only water bubble
Option “3” is correct Bubble baby disease (severe combined immunodeficiency, SCID) is often called “bubble boy disease”. There are several forms of SCID. The famous ‘Bubble Baby Disease’ is named so as the suffering baby is treated in a germ-free plastic bubble.
763. In the names Mangifera indica (mango), Solanum tuberosum (potato) and Panthera leo (lion), the terms Mangifera, Solanum and Panthera represent the higher level of?
In the names Mangifera indica (mango), Solanum tuberosum (potato) and Panthera leo (lion), the terms Mangifera, Solanum and Panthera represent the higher level of Taxon.
764. In which part of the eye lies the pigment that decides the colour of the eyes of a person?
1. Cornea
2. Choroid
3. Iris
4. Vitreous body
Option “3” is correct The iris is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupils and thus the amount of light reaching the retina. “Eye color” is the color of the iris, which in humans can be green, blue, black or brown.
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.
Antibodies are produced by specialized white blood cells called lymphocytes.
769. Arthritis is caused by the deposition of which “of the following” in the joints of the body?
1. Urea
2. Uric acid
3. Albumin
4. Cholesterol
Option “2” is correct Arthritis is caused by deposition of uric acid crystals (mono-sodium urate) in joints and fluids within the body gout, is a painful form of arthritis.
770. Children especially in western countries who receive very little sunshine suffer from –
1. Rickets
2. Dermatitis
3. Scurvy
4. Measles
Option “1” is correct Children especially in western countries who receive very little sunshine suffer from Rickets.
