Ecosystem MCQs | NCERT Biology
This Chapter-wise Multiple Choice Questions on 'Ecosystem' for NEET Examination, based on NCERT Biology Class-12 (Chapter-12) with Answer Key and Solutions.
1.
Read the book NCERT Biology class-12 (chapter- 12): Ecosystem from here.
1. Question
In most ecosystems, the pyramids of number, energy and biomass are upright, except:
Pyramid of number in grassland
Pyramid of biomass in grassland
Pyramid of number in sea
Pyramid of biomass in sea
Correct Answer
Wrong Answer
2. Question
Plants capture only ..................of the photosynthetically active radiation.
Choose correct option to fill the blank :-
0.2 – 1 percent
1 – 5 percent
20 – 100 percent
2 – 10 percent
Correct Answer
Wrong Answer
3. Question
What is true for following food web ?
B, C, D, E are primary producers
E, F, G, H are carnivores
K is herbivores
I and J may be predator/ secondary consumer
Correct Answer
Wrong Answer
4. Question
Which of the following statements is not correct?
Pyramid of biomass in sea is generally inverted.
Pyramid of biomass in sea is generally upright.
Pyramid of energy is always upright.
Pyramid of numbers in a grassland ecosystem is upright.
Correct Answer
Wrong Answer
5. Question
Which one of the following is not a functional aspect of an ecosystem ?
Energy flow
Decomposition
Productivity
Stratification
Correct Answer
Wrong Answer
6. Question
Conversion of humus into inorganic nutrients is called:
Catabolism
Leaching
Mineralisation
Fragmentation
Correct Answer
Wrong Answer
7. Question
Which one of the following are the incorrect full form:
GFC → Grazing food chain
DFC → Detritus food chain
PAR → Photosynthetically active radiation
GPP → Grazing percentage productivity
Correct Answer
Wrong Answer
8. Question
Which animal may be placed at third trophic level?
Birds
Fishes
Wolf
All
Correct Answer
Wrong Answer
9. Question
Given below are two statements
Statement I: In an aquatic ecosystem GFC is the major conduit for energy flow.
Statement II: Decomposers secrete digestive enzymes that break down dead and waste material into simple, inorganic material, which are subsequently absorbed by them.
Choose the correct answer from the option given below:
Both Statement I and Statement II are incorrect
Statement I is correct but Statement II is incorrect
Statement I is incorrect but Statement II is correct
Both Statement I and Statement II are correct
