General Science - Biology MCQs
81. Which part of the plant is used in making saffron spice?
[A] Stigma
[B] Sepal
[C] Petal
[D] Leaf
Show Answer
Correct Answer: A [Stigma]
Notes:
Stigma of the plant is used in making the saffron spices. In making the saffron spice, stigma of the plant is used. Stigma is the top of the centre part of a flower. It receives the pollen that allows it to form new seeds.
82. Which process develops new species from the existing species?
[A] Homologous
[B] Analogous
[C] Speciation
[D] Genetic variation
Show Answer
Correct Answer: C [Speciation]
Notes:
Speciation is the formation of new species. Speciation is the evolutionary process by which populations evolve to become distinct species. The biologist Orator F. Cook coined the term in 1906 for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages.
83. Aves have evolved from which of the following?
[A] Amphibians
[B] Arthropods
[C] Mammals
[D] Reptiles
Show Answer
Correct Answer: D [Reptiles]
Notes:
Birds evolved from theropod dinosaurs during the Jurassic around 165–150 million years ago. Birds aren’t just closely related to dinosaurs, they really are dinosaurs! This is what most people mean when they say that birds are reptiles, although technically according to the phylogenetic system mammals are also reptiles.
84. Name the organs which have different basic structure but have similar appearance and perform similar functions.
[A] Analogous organs
[B] Homologous organs
[C] Both A and B
[D] Neither A nor B
Show Answer
Correct Answer: A [Analogous organs]
Notes:
Analogous organs have different basic structure but have similar appearance and perform similar functions. Example wings of an insect and a bird have different structures but similar functions.
85. Guttation takes place due to the development of which of the following?
[A] Cells
[B] Transpiration
[C] Root pressure
[D] All of the above
Show Answer
Correct Answer: C [Root pressure]
Notes:
Guttation takes place due to the development of root pressure. Guttation is the exudation of drops of xylem sap on the tips or edges of leaves of some vascular plants, such as grasses and a number of fungi.
86. 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.
87. Snakes, turtle, lizards and crocodiles falls under which category of animals?
[A] Amphibian
[B] Pisces
[C] Reptiles
[D] Aves
Show Answer
Correct Answer: C [Reptiles]
Notes:
Reptiles are tetrapod animals in the class Reptilia, comprising today’s turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives. The study of these traditional reptile orders, historically combined with that of modern amphibians, is called herpetology
88. Which part of the plant gives us saffron?
[A] Petals
[B] Stigma
[C] Roots
[D] Stem
Show Answer
Correct Answer: B [Stigma]
Notes:
The dried stigmas (thread-like parts of the flower) are used to make saffron spice. It can take 75,000 saffron blossoms to produce a single pound of saffron spice. Saffron is largely cultivated and harvested by hand.
89. Which organ has finger like outgrowths which are called as villi (Singular Villus)?
[A] Bladder
[B] Stomach
[C] Small Intestine
[D] Large Intestine
Show Answer
Correct Answer: C [Small Intestine]
Notes:
The internal walls of the small intestine are covered in finger-like tissue called villi. Each of these villi is covered in even smaller finger-like structures called microvilli. These villi and microvilli increase the surface area available for the absorption of nutrients.
90. Which among the following carries impure blood to human heart?
[A] Pulmonary vein
[B] Vena Cava
[C] Aorta
[D] Pulmonary arteries
Show Answer
Correct Answer: D [Pulmonary arteries]
Notes:
The pulmonary artery carries impure blood to the right and left lungs. The left half of the heart collects and pumps pure (oxygenated) blood from the lungs to all parts of the body.
[contact-form-7 id="141158" title="Contact form 1"]
