Ecosystem MCQ Questions for Class 12 Biology Chapter 14 with Answers

Its our pleasure to assist you towards your goal .for inbuilt quality question with standard solution may help you a lot. Class 12 Biology book Chapter 14 Ecosystem with Answers Pdf free download .This may assist you to understand and check your knowledge about the chapters .MCQ question and solution may help you to get better performance in exam .These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

NCERT MCQ Chapters for Class 12 Biology

Q1. Vertical distribution of different species occupying different levels in dense vegetation is called

(A) stratification
(B) species composition
(C) standing crop
(D) trophic structure

(A) stratification

Q2. The second stage of hydrosere is occupied by plants like

(A) Azolla
(B) Typha
(C) Carex
(D) Vallisneria.

(D) Vallisneria.

Q3. Which of the following is the most stable ecosystem?

(A) Forest
(B) Desert
(C) Mountain
(D) Ocean

(D) Ocean

Q4. River water deposits

(A) loamy soil
(B) alluvial soil
(C) laterite soil
(D) sandy soil

(B) alluvial soil

Q5. Term ‘ecosystem’ was coined by

(A) Odum
(B) Tansley
(C) Lindeman
(D) Elton.

(B) Tansley

Q6. Which of the following is not a producer?

(A) Spirogyra
(B) Agaricus
(C) Volvox
(D) Nostoc.

(B) Agaricus

Q7. Which of the following types of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100 mm.

(A) Grassland
(B) Shrubby forest
(C) Desert
(D) Mangrove.

Q8. Which of the following statements is correct for secondary succession?

(A) It begins on a bare rock.
(B) It occurs on a deforested area.
(C) It follows primary succession.
(D) It is similar to primary succession, but has a relatively fast pace.

(D) It is similar to primary succession, but has a relatively fast pace.

Q9. Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem?

(A) Secondary Production
(B) Tertiary Production
(C) Gross Production (GP)
(D) Net Production (NP)

Q10. In lithosere, foliose lichens make the conditions favourable for the growth of

(A) crustose lichens
(B) mosses
(C) annual grasses
(D) perennial grasses.

(B) mosses

Q11. Edaphic factor refers to

(A) water
(B) soil
(C) relative humidity
(D) altitude.

(B) soil

Q12. Flow of energy in our ecosystem takes place :

(A) only in one direction
(B) possible in two directions
(C) in three dimensions
(D) may occur in multiple directions

(A) only in one direction

Q13. The reservoir for the gaseous type of bio-geochemical cycle exists in

(A) stratosphere
(B) atmosphere
(C) ionosphere
(D) lithosphere.

(B) atmosphere

Q14. An inverted pyramid of biomass can be found in which ecosystem?

(A) Forest
(B) Marine
(C) Grassland
(D) Tundra.

(B) Marine

Q15. Which one of the following ecosystem types has the highest annual net primary productivity?

(A) tropical deciduous forest
(B) temperate evergreen forest
(C) temperate deciduous forest
(D) tropical rain forest

(D) tropical rain forest

Q16. Which of the following is a pioneer species in xerarch succession?

(A) Phytoplanktons
(B) Lichens
(C) Bryophytes
(D) Sedges

(B) Lichens

Q17. The reservoir for the gaseous type of biogeochemical cycle exists in

(A) stratosphere
(B) atmosphere
(C) ionosphere
(D) lithosphere.

(B) atmosphere

Q18. The rate of conversion of light energy into chemical energy of organic molecules in an ecosystem is

(A) net primary productivity
(B) gross primary productivity
(C) secondary productivity
(D) gross secondary productivity.

(B) gross primary productivity

Q19. How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?

(A) 1%
(B) 10%
(C) 40%
(D) 90%.

(B) 10%

Q20. The common nitrogen-fixer in paddy fields is

(A) Rhizobium
(B) Azospirillum
(C) Frankia
(D) Oscillatoria

(B) Azospirillum

I Think the given NCERT MCQ Questions for class 12 Biology book Chapter 14 Ecosystem with Answers Pdf free download will assist you. If you’ve got any queries regarding CBSE Class 12 Biology Ecosystem MCQs Multiple Choice Questions with Answers, drop a comment below and that we will come back to you soon.