Ecological Services Test
Ecological Services
This is online test 01 for CBSE class 12 Biology Ecosystem (Ecological services).. There are 10 questions in this test with each question having around four answer choices.
Questions & Answers
1
Humus will never be:
- Areservoir of nutrients
- Bgood for plant growth
- Cresistant to microbial action
- Damorphous substance present at the top of soil surfaceCorrect
2
Which one of the following is the most important service provided by ecosystems:
- Aaesthetic values
- Bsoil formationCorrect
- Cpollination
- Dwater purification
3
The product of ecosystem processes are called as
- AEcological benefits.
- BEcosystem services.Correct
- CEconomic services
- DBiological services
4
The value of ecosystem services of biodiversity is
- ADifficult to determine.Correct
- BEasily calculated.
- CWithout any price.
- DCannot be estimated
5
Which of the following ecosystem services cost maximum
- AHabitat of wild life.
- BSoil formationCorrect
- CRecreation
- DNutrient cycling
6
The scientist who put price tag of US$ 33 trillion a year for nature’s life-support services was
- AWilliam Haber and his colleagues.
- BWilliam Contanza and his colleagues.
- CRobert Contanza and his colleagues.Correct
- DRobert hook and his colleagues.
7
Forests controls drought through
- AFunctioning as water shed.
- BRetention of water and prevention of soil erosion.Correct
- CIncreasing rainfall
- DLot of water plant
8
Universal non-polluting source of energy is
- ASunCorrect
- BWind and water
- CFossils fuels
- DNuclear energy
9
Earth crust is the reservoir of sedimentary type of nutrients like
- ACarbon dioxide
- BPhosphorusCorrect
- CNitrogen
- DOxygen
10
Fundamental ecosystem services are taken as granted because
- AThey are priceless
- BThey are easily available
- CThey are freeCorrect
- DThey are provided by nature