Main Subjects
Main Subjects MCQs With Answers
0 Main Subjects MCQs for CSS, PPSC, FPSC, NTS and entry-test preparation. Take a scored quiz instead →
Computer (406)
Current Affairs (1218)
English (1391)
Everyday Science (827)
General Knowledge (457)
Islamic Studies (850)
Mathematics (1392)
Pakistan Studies (811)
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
What is the primary cause of ocean acidification?
AOil spills in oceans
BAbsorption of atmospheric carbon dioxide by oceans
CPlastic pollution
DAgricultural fertilizer runoff
In an ecological food chain, decomposers typically belong to which groups?
AInsects and birds
BBacteria and fungi
CAlgae and mosses
DViruses and protozoa
What process powers the Sun and other stars?
ANuclear fission
BNuclear fusion
CChemical combustion
DRadioactive decay