Biology (Part-III) (Railway)

Total Questions: 50

41. Rana Tigrina is the scientific name of which animal? [RRB NTPC CBT-1 Exam, 27.01.2021 (Shift-II)]

(1) Leopard
(2) Tiger
(3) Wolf
(4) Asian Frog

Correct Answer: (4) Asian Frog

Solution:Rana Tigrina is the scientific name of the Asian frog.

• Rana Tigrina is reclassified into a different genus and is now known as Hoplobatrachustigerinus.

42. Which of the following birds is a critically endangered species? [RRB NTPC CBT-1 Exam, 27.01.2021 (Shift-II)]

(1) Crow
(2) Cuckoo
(3) Great Indian Bustard
(4) Peacock

Correct Answer: (3) Great Indian Bustard

Solution:The Great Indian Bustard (GIB), the State bird of Rajasthan, is considered India's most critically endangered bird.

• It is considered the flagship grassland species, representing the health of the grassland ecology.

• Its population is confined mostly to Rajasthan and Gujarat. Small populations occur in Maharashtra, Karnataka and Andhra Pradesh.

43. Brassica Campestris is the botanical name of which plant? [RRB NTPC CBT-1 Exam, 27.01.2021 (Shift-II)]

(1) Field mustard
(2) Common wheat
(3) Buckwheat
(4) Corn

Correct Answer: (1) Field mustard

Solution:The botanical name of Field Mustard is Brassica campestris.

44. Which is the outermost covering of the cell that separates the contents of the cell from its external environment? [RRB NTPC CBT-1 Exam, 03.02.2021 (Shift-I)]

(1) Plasma membrane
(2) Organelles
(3) Nerve cell
(4) Smooth muscle cell

Correct Answer: (1) Plasma membrane

Solution:The plasma membrane is the membrane found in all cells that separates the interior of the cell from the outside environment.

• It guards the cell against the various external stressors or substances.

• It is composed of a phospholipid bilayer, proteins, lipids, carbohydrates, and other components.

45. What is the function of alveoli? [RRB NTPC CBT-1 Exam, 04.02.2021 (Shift-I)]

(1) To help digest food
(2) To provide a surface where exchange of gases takes place
(3) To aid in absorption of food
(4) To purify blood

Correct Answer: (2) To provide a surface where exchange of gases takes place

Solution:Alveoli are tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs).

• The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out

46. The laws of inheritance were discovered by: [RRB NTPC CBT-1 Exam, 04.02.2021 (Shift-I)]

(1) Charles Darwin
(2) Archibald Garrod
(3) Hugo de Vries
(4) Gregor Mendel

Correct Answer: (4) Gregor Mendel

Solution:Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance.

• He deduced that genes come in pairs and are inherited as distinct units, one from each parent.

47. The approach based on the idea that 'organisms which are more distantly related will accumulate a greater number of differences in their DNA' is called? [RRB NTPC CBT-1 Exam, 04.02.2021 (Shift-I)]

(1) The DNA study
(2) Morphological approach
(3) Molecular phylogeny
(4) Metamorphosis

Correct Answer: (3) Molecular phylogeny

Solution:Molecular phylogeny is a scientific discipline that involves the comparative analysis of the nucleotide sequences of genes and the amino acid sequences and structural features of proteins from which evolutionary histories and relationships.

• Molecular phylogenetic predates DNA sequencing by several decades.

48. Kharai Camels are known to mainly feed on: [RRB NTPC CBT-1 Exam, 04.02.2021 (Shift-I)]

(1) Cactus
(2) Mangroves
(3) Joshua tree
(4) Brittlebush

Correct Answer: (2) Mangroves

Solution:Kharai camels are known to feed on mangroves on the island off shore.

• They eat this salty marine food, they sometimes swim for hours.

• Kharai Camel are found only in Gujarat's Bhuj area.

49. Who coined the phrase 'Survival of the fittest"? [RRB NTPC CET-1 Exam, 04.02.2021 (Shift-I)]

(1) Archimedes
(2) Herbert Spencer
(3) Charles Darwin
(4) Albert Einstein

Correct Answer: (2) Herbert Spencer

Solution:Herbert Spencer is famous for his doctrine of social Darwinism, which asserted that the principles of evolution.

• He coined the term 'survival of the fittest' seven years before Darwin's publication of his theory of natural history, The Origin of the Species in 1859.

50. _________is NOT a carnivorous plant. [RRB NTPC CBT-1 Exam, 04.02.2021 (Shift-II)]

(1) Corkscrew
(2) Sundew
(3) Tiger Lily
(4) Monkeycup

Correct Answer: (3) Tiger Lily

Solution:Tiger Lily (Lilium lancifolium) is an Asian species of lily, native to China, Japan, Korea, and the Russian Far East.

• It is widely planted as an ornamental because of its showy orange-and-black flowers.

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