GENERAL SCIENCE- BIOLOGY 51 to 60

51. Which part becomes modified as the tusk of elephant?
A. Canine
B. Premolar
C. Second incisor
D. Molar

The Answer is- Second incisor

52. Which one of the following is a part of Biotic Environment?
A.Lithosphere
B.Hydrosphere
C.Atmosphere
D.Biosphere

The Answer is- Biosphere

53. The excretory organs in cockroach are-
A.Nephridia
B.Flame cells
C.Malphigian tubules
D.Coelomic ducts

The Answer is-Malphigian tubules

54. Largest flower is-
A.Cauliflower
B.Cabbage
C.Rafflesia
D.None of these

The Answer is- Rafflesia

55. Which one of the following is commonly known as ‘grand old man of intestine’?
A.Plasmodium
B.Amoeba
C.Giardia
D.None of these

The Answer is- Giardia

56. Sleeping sickness is caused by
A.Trypanosoma
B.Plasmodium
C.Paramecium
D.Volvox

Answer: Trypanosoma

57. Which one of the following is a single membrane organelle?
A.Mitochondria
B.Nucleus
C.Lysosome
D.Endoplasmic reticulum

Answer: C.Lysosome

58. The word hormone was coined by –
A.Starling (1905)
B.Starling (1927)
C.Robert Hook (1665)
D.None of the above

The Answer is- Starling (1905)

59. Nails and Hair are examples of-
A.Keratin
B.Fibrin
C.Elastin
D.Collagen

The Answer is- Keratin

60. Kidney stones are mainly formed by which of the following compound ?
[A] Sodium chloride
[B] Silicates
[C] Calcium bicarbonate
D] Calcium Oxalate

Answer: D – Calcium Oxalate

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