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Class 12 Biology - Chapter 14: Ecosystem MCQ Questions

20 Questions 40 Minutes
Answered: 0 / 20

Your Class 12 Biology Study Path

  1. 1LearnNCERT Solutions
  2. 2PracticeChapter MCQs
  3. 3TestChapter Test
  4. 4PrepareSample Papers
  5. 5Exam PracticePrevious-Year Papers
  6. 6Final CheckMock Test
Question 1

Decomposers like fungi and bacteria are: (i) autotrophs; (ii) heterotrophs; (iii) saprotrophs; (iv) chemo-autotrophs. Choose the correct answer:

Question 2

Among the following biogeochemical cycles which one does not have losses due to respiration?

Question 3

Which of the following types of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100 mm.

Question 4

The process of mineralisation by micro organisms helps in the release of:

Question 5

Among the following, where do you think the process of decomposition would be the fastest?

Question 6

If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be

Question 7

Which of the following is an ecosystem service provided by a natural ecosystem?

Question 8

How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?

Question 9

The sequence of communities of primary succession in water is:

Question 10

Pyramid of numbers is:

Question 11

Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis?

Question 12

The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called:

Question 13

During the process of ecological succession the changes that take place in communities are :

Question 14

Productivity is the rate of production of biomass expressed in terms of: (i) (kcal m-3) yr-1; (ii) g-2 yr-1; (iii) g-1 yr-1; (iv) (kcal m-2) yr-1.

Question 15

An inverted pyramid of biomass can be found in which ecosystem?

Question 16

Climax community is in a state of:

Question 17

Which of the following is not a producer?

Question 18

The reservoir for the gaseous type of bio-geochemical cycle exists in

Question 19

Which of the following ecosystems is most productive in terms of net primary production?

Question 20

Edaphic factor refers to:

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