MCQ ON ECOSYSTEM SERVICES class 12 for NEET

MCQ ON ECOSYSTEM SERVICES class 12 for NEET | ECOSYSTEM SERVICES class 12 | MCQ ECOSYSTEM SERVICES with Answer | Check the below NCERT MCQ question for class 12 Biology based on the with Answers.

MCQ on ECOSYSTEM SERVICES class 12 Biology with answers were prepared based on the latest pattern. We have provided class 12 Biology MCQs questions on ECOSYSTEM SERVICES with Answers to help students understand the concept very well.

MCQ ON ECOSYSTEM SERVICES is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM 2022-23, 2023-24

Introduction:
Important characteristic of all community is died their composition and structure constantly change in response to the changing in environmental conditions. This change is orderly and sequential parallel with a changes in the physical environment. This changes laid finally to a community that is in near equilibrium be the environment and that is called climax communities. The gradual and fairly predictable change in a species composition of given area is called ecological succession. During succession some species colonize in area and their population become more numerous where is populations of other species decline and even disappear. Entire sequence of community that successively change in a given area are called seres. The individual transitional community are termed seral stages or seral communities. The present day community in the world have come to be because of the succession that has occurred over millions of years since life started on earth. Success a process that starts in an area where no living organisms are there which could be areas where no living organism ever existed ,say bare rock or in areas that somehow lost all the living organisms that existed there.
Healthy ecosystems are the best for wide range of economic, environmental and aesthetic goods and services. The products of ecosystem process are named as ecosystem services. For example healthy forest ecosystem purify air and water, mitigate droughts and floods, cycle nutrients, generate fertile soils, provide wild life habitat, maintain biodiversity, pollinate crops, provide storage site for carbon, Also provide aesthetic, cultural and spiritual values.

MCQ ON ECOSYSTEM SERVICES class 12 for NEET

1. Healthy ecosystems are the base for a wide range of economic environmental and aesthetic goods and services. Products of ecosystem processes are named as

(a) ecosystem services
(b) ecological succession
(c) sere
(d) Pioneer species

Ans (a) ecosystem services

2. The concept of ecosystem services was given by

(a) Robert Hook
(b) Robert Constanza
(c) Robert brown
(d) Odum

Ans. (b) Robert Constanza

3. Research have put an average price tag of …………a year on these fundamental ecosystem services which are largely taken for granted because they are free.

(a) US $ 33 trillion
(b) US $ 30 trillion
(c) US $ 25 trillion
(d) all the above

Ans. (a) US $ 33 trillion

4. The value of global gross national product GNP is

(a) US $ 18 trillion
(b) US $ 20 trillion
(c) US $ 30 trillion
(d) US $ 25 trillion

Ans.(a) US $ 18 trillion

5. Out of the total cost of various ecosystem service which accounts for about 50%

(a) soil formation
(b) recreation and nutrient cycle
(c) climate regulation
(d) habitat for wildlife

Ans.(a) soil formation

6. Out of the total cost of various ecosystem services which services contributions would be less than 10% each

(a) soil formation
(b) nutrient cycling and recreation
(c) the cost of climate regulation
(d) habitat for wildlife

Ans.(b) nutrient cycling and recreation

7. Out of the total cost of various ecosystem services which services provide are about 6% each ?

(a) the soil formation
(b) recreation and nutrient cycling
(c) the cost of climate regulation and habitat for wildlife
(d) all the above

Ans.(c) cost of climate regulation and habitat for wildlife

8. Which are groups of ecosystem services

(a) healthy forest ecosystem
(b) mitigate droughts and floods
(c) cycle nutrients
(d) all the above

Ans.(d) all the above

9. The driving force for an ecosystem is

(a) biomass
(b) producers
(c) carbohydrates in producers
(d) solar energy

Ans. (d) solar energy

10. To component of an ecosystem are

(a) plants and animals
(b) weeds, trees, animals and man
(c) energy flow and mineral cycling
(d) biotic and abiotic

Ans. (d) biotic and abiotic

11. Biotic component of an ecosystem include

(a) producers, consumers and decomposers
(b) producers and consumers
(c) producers only
(d) consumers only

Ans.(a) producers consumers and decomposers

12. Biom has organisms of various trophic levels

(a) reacting with abiotic environment
(b) constitutes sociological unit
(c) liver symbiotic life
(d) inhabit a desert

Ans . (a) reacting with abiotic environment

13. Controlling factor in ecosystem is

(a) soil moisture
(b) food
(c) predation
(d) temperature

Ans.(c) predation

14. Weathering of rocks makes Phosphorus available to first

(a) producers
(b) decomposers
(c) consumers
(d) none of the above

Ans. (a) producers

15. Source of maximum sulphur is

(a) ocean
(b) lakes
(c) land
(d) rocks

Ans.(d) rocks

16. An easily disturb ecosystem which can recover after sometime after the stoppage of damaging factory is

(a) low stability and high resilience
(b) high stability and high resilience
(c) low stability and low resilience
(d) high stability and low resilience

Ans.(a) low stability and high resilience

17. Stability of ecosystem depence on

(a) primary productivity
(b) number of producers
(c) number of consumers
(d) interchange between producers and consumers

And.(d) interchange between producers and consumers

18. An ecosystem with little primary productivity is

(a) forest
(b) river
(c) sea
(d) grassland

Ans. (b) river

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