Main Subjects
Main Subjects MCQs With Answers
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Which planet is referred to as Earth’s ‘Twin’ due to similar size and mass?
AMars
BVenus
CMercury
DNeptune
Acid rain is primarily caused by atmospheric pollution from oxides of which elements?
ACarbon and Nitrogen
BSulfur and Nitrogen
CSulfur and Phosphorous
DCarbon and Chlorine
The boundary beyond which nothing, not even light, can escape a black hole is called:
AAccretion Disk
BEvent Horizon
CSingularity
DPhoton Sphere
What term describes the functional role and position of an organism within its ecological habitat?
AEcosystem
BEcological Niche
CBiome
DBiosphere
The international treaty signed in 1987 to protect the ozone layer by phasing out ODS is:
AKyoto Protocol
BParis Agreement
CMontreal Protocol
DRamsar Convention
Organisms that produce their own food using light energy or chemical energy are called:
AHeterotrophs
BAutotrophs
CDecomposers
DSaprophytes
Which organ in the human body produces bile?
AGallbladder
BPancreas
CLiver
DStomach
What is the primary function of Red Blood Cells (RBCs)?
AFight infection
BClot blood
CTransport oxygen
DProduce antibodies
How many bones are present in the adult human skeleton?
A206
B208
C300
D310
Which part of the human brain controls balance and motor coordination?
ACerebrum
BCerebellum
CMedulla Oblongata
DHypothalamus