1. Syrinx is the voice box in

(a) Amphibians
(b) Reptiles
(c) Birds
(d) Mammals

2. The largest ecosystem of the Earth is

(a) Biome
(b) Hydrosphere
(c) Lithosphere
(d) Biosphere

3. In a food chain, the solar energy utilized by plants is only

(a) 10 per cent
(b) 1 per cent
(c) 0.1 per cent
(d) 0.01 per cent

4. Supersonic jet causes pollution by thinning of

(a) O3 layer
(b) O2 layer
(c) SO2 layer
(d) CO2 layer

5. OTEC stand for

(a) Ocean Thermal Energy Conservation
(b) Oil and Thermal EnergyConservation
(c) Ocean Thermal EnergyConversion
(d) Ocean Thermal Energy Conversion

E-Books for SSC CGL, CHSL, JE, MTS Govt Exams

Printed Study Kit for SSC CGL (Tier-1) Exam

एसएससी CGL(Tier-1) HINDI परीक्षा ​​अध्ययन सामग्री

Answers:
1. (c) 2. (a) 3. (c) 4. (a) 5. (d)