Ecosystem MCQs with Answers

The functional unit of nature is ?

• A.Biosphere
• B.Ecosystem
• C.Community
• D.Population

What is the main reason for the death of aquatic animals like fish in sewage-contaminated water?

• A.Increase in water temperature
• B.Presence of toxic chemicals
• C.Lack of dissolved oxygen
• D.Excessive algal growth

The species that have an extremely high risk of extinction in the wild is called?

• A.Endangered (EN)
• B.Vulnerable (VU)
• C.Critically endangered (CR)
• D.Near threatened (NT)

Rates of deforestation recorded highest in _?

• A.Brazil
• B.Democratic Republic of Congo
• C.Indonesia
• D.Malaysia

Past Paper MCQ

Primary succession starts on dry soil is known as?

• A.Psammosere
• B.Hydrosere
• C.Lithosere
• D.Xerosere

Desert ecosystem of Bhakkar and Mianwali is called ?

• A.Kharan Desert
• B.Cholistan Desert
• C.Thar Desert
• D.Thal Desert

Those species which are abundant in parts of their range but gradually declining in total numbers are called _?

• A.Endangered species
• B.Extinct species
• C.Vulnerable species
• D.Threatened species

Major energy producing group of a terrestrial ecosystem, is comprised of ?

• A.Plants
• B.Animals
• C.Fungi
• D.Bacteria

IUCN category IV of protected area is about the management of ?

• A.Habitat/species
• B.Ecosystem services
• C.Wilderness preservation
• D.Natural monuments

Humans harvesting of wild organisms at rates exceeding the growth ability of population is called ?

• A.Over-exploitation
• B.Over-grazing
• C.Deforestation
• D.Habitat fragmentation