Friday, April 19, 2019

WBCS Polity and Constitution MCQs Prelims and Mains

General Science MCQ PDF Download For Govt Exams P4


Page 4

142431. The simple microscope was first invented by
A
Purkinje
B
Robert Brown
C
Robert Hooke
D
Leeuwenhoek
D
Correct Answer: D. Leeuwenhoek
126332. The smallest size of a cell which can be seen with the unaided eye is
A
100 microns
B
1000 microns
C
One micron
D
10 microns
A
Correct Answer: A. 100 microns
133833. Oil is obtained from the endosperm of
A
Mustard
B
Sesame
C
Groundnut
D
Coconut
D
Correct Answer: D. Coconut
131534. Which one of the following is not an endocrine gland?
A
Salivary gland
B
Thyroid gland
C
Adrenal gland (cortex)
D
Pituitary gland
A
Correct Answer: A. Salivary gland
133235. The percentage of solar energy absorbed by the leaves of green plants in photosynthesis is
A
1
B
10
C
30
D
50
A
Correct Answer: A. 1
133136. In angiosperm, triple fusion is required for the formation of
A
Suspensor
B
Pericarp
C
Embryo
D
Endosperm
D
Correct Answer: D. Endosperm
141337. Name one rootless plant
A
Monochoria
B
Pistia
C
Ceratophyllum
D
Eichhornia
B
Correct Answer: B. Pistia
127638. Xylem tissue mainly concerned with the
A
Storage of prepared foods plants
B
Transport of enzymes in plants
C
Photosynthesis of plants
D
Transport of water and mineral nutrients in plants
D
Correct Answer: D. Transport of water and mineral nutrients in plants
Explanation:

Xylem is present in the vascular plant. It is a specialized tissue that helps in the conduction of water and nutrients from the soil to the stem and leaves. It provides mechanical support to the plant. Xylem consists of dead cells (parenchyma is the only living cell present in the xylem).

252539. Where is the image of an object formed in human eye?
A
cornea
B
iris
C
pupil
D
retina
D
Correct Answer: D. retina
252640. Halophytes grow well in
A
acidic soils
B
cold soils
C
soils containing calcium
D
saline soils
D
Correct Answer: D. saline soils



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