General Science - Biology MCQs
81. To which organ of the body is the disease ‘Glaucoma’ related to?
[A] Ear
[B] Heart
[C] Bones
[D] Eye
Show Answer
Correct Answer: D [Eye]
Notes:
Glaucoma is an eye disease that is often associated with elevated intraocular pressure, in which damage to the eye (optic) nerve can lead to loss of vision and even blindness.
82. Which of the following terms denotes the transpiration through leaves?
[A] Cauline transpiration
[B] Foliar transpiration
[C] Cuticular transpiration
[D] Lenticular transpiration
Show Answer
Correct Answer: B [Foliar transpiration]
Notes:
the transpiration which takes place through the leaves is called foliar transpiration. The foliar transpiration may be stomata’ transpiration or cuticular transpiration.
83. Which of the following is the primary function of the stem in plants?
[A] Support leaves
[B] Deliver water to leaves
[C] Transport useful products
[D] All of the above
Show Answer
Correct Answer: D [ All of the above ]
Notes:
The primary functions of the stem are to support the leaves, to conduct water and minerals to the leaves, where they can be converted into usable products by photosynthesis, and to transport these products from the leaves to other parts of the plant, including the roots.
84. In which of the following plants, gametophyte is considered prothallus?
[A] Bryophyte
[B] Thallophyta
[C] Spermatophyte
[D] Pteridophyta
Show Answer
Correct Answer: D [Pteridophyta]
Notes:
Gametophyte is considered prothallus in Pteridophytes. Just as with seed plants and mosses, the life cycle of pteridophytes involves alternation of generations. This means that a diploid generation of the sporophyte, which produces spores is followed by a haploid generation i.e. the gametophyte or prothallus, which produces gametes.
85. Which weed is found useful to check water pollution caused by industrial affluents ?
[A] Water hyacinth
[B] Elephant grass
[C] Parthenium
[D] All of the above
Show Answer
Correct Answer: A [Water hyacinth]
Notes:
Water hyacinth as indicator of heavy metal pollution in the tropics. The water hyacinth (Eichhornia crassipes) is a common aquatic plant in many tropical countries. Its ability absorb nutrients and other elements from thewater has made it possible to use it for water purification purposes.
86. Which of the following fibres catches fire least?
[A] Rayon
[B] Terricot
[C] Cotton
[D] Nylon
Show Answer
Correct Answer: C [Cotton]
Notes:
Cotton is the fibre that is least prone to catch fire. There are many other such fibres but cotton tops the list here. Cotton is natural fibre which is polymer of glucose. cotton helps to prevent on catching fibre. That’s why our parents use cotton clothes in kitchen.
87. Which of the following mammals are highly intelligent?
[A] Elephants
[B] Whales
[C] Dolphins
[D] Kangaroos
Show Answer
Correct Answer: C [Dolphins]
Notes:
Some of the most amazing things about dolphins are their senses of empathy, altruism, and attachment. The habit of helping injured individuals extends across the species barrier as evidenced by the many accounts of dolphins carrying humans to the surface to breathe.
88. Which fabric was introduced by Sir H.B. Lumsden and W. Hodson in 1848 for the uniforms of British colonial troops in India?
[A] Corduroy
[B] Denim
[C] Khaki
[D] Silk
Show Answer
Correct Answer: C [Khaki]
Notes:
Khaki was introduced by Sir H.B. Lumsden and W. Hodson in 1848 for the uniforms of British colonial troops in India. Lumsden originated the use of a strange new mud coloured uniform called khaki in 1848.
89. Which of the following cells are closely associated and interacting with guard cells?
[A] Transfusion tissue
[B] Complementary cells
[C] Subsidiary cells
[D] Hypodermal cells
Show Answer
Correct Answer: C [Subsidiary cells]
Notes:
Subsidiary cells are the accessory cells to guard cells in the epidermis of plants. Two or four subsidiary cells are found surrounding the pair of guard cells. Subsidiary cells do not consist of chloroplasts. They provide support for the functioning of guard cells in the epidermis.
90. Which among the following is an example of solid sol?
[A] Milk of magnesia
[B] Rubber
[C] Coloured gemstones
[D] Foam
Show Answer
Correct Answer: C [Coloured gemstones]
Notes:
Solid sol is a type of colloid, of the form of one solid dispersed in another continuous solid. Coloured gemstones are solid sols, colloids in which solid particles are dispersed in solid medium.
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