Class 12th Exam Science Stream Biology VVI Objective Type Question Ecosystem Chapter
14. ECOSYSTEM
1. Which among the following is an example of xerophytic adaption ?
(A) Moss
(B) Zinnia
(C) Rose
(D) Opuntia
| Answer :- (D) |
2. Which one of the following is insectivorous plant ?
(A) Drosera
(B) Nepenthes
(C) Both ‘A’ and ‘B’.
(D) Hydrilla
| Answer :- (C) |
3. Regulation of spermatogenesis is done by :
(A) oestrogen
(B) L.H.
(C) androgen
(D) none of these
| Answer :- (C) |
4. Secondary productivity is related to :
(A) Producers
(B) Herbivores
(C) Carnivores
(D) Omnivores
| Answer :- (B) |
5. Which of the following factors is important in the formation of new species ?
(A) Competition
(B) Mutation
(C) Isolation
(D) Continuous variation
| Answer :- (B) |
6. Green plants in an ecosystem are:
(A) Producers
(B) Consumers
(C) Decomposers
(D) None of these
| Answer :- (A) |
7. Frog feeding on herbivorous insect is :
(A) Primary consumer
(B) Secondary consumer
(C) Tertiary consumer
(D) Top carnivore
| Answer :- (B) |
8. Controlling factor in ecosystem is :
(A) Soil moisture
(B) Food
(C) Predation
(D) Temperature
| Answer :- (C) |
9. The term biocoenosis was coined by :
(A) Darwin
(B) Haeckel
(C) Odum
(D) Mobius
| Answer :- (D) |
10. Decomposers are :
(A) Animalia and Monera
(B) Protista and Animalia
(C) Fungi and Plantae
(D) Bacteria and Fungi
| Answer :- (D) |
11. In a biotic community primary consumers are :
(A) Carnivores
(B) Detrivores
(C) Herbivores
(D) Omnivores
| Answer :- (C) |
12. Who introduced term Ecosystem?
[(A) A.G. Tansley
(B) Reiter
(C) Odum
(D) Aristle
| Answer :- (A) |
13. Soil developed from sedimented rock :
(A) force Science
(B) Edaphology
(C) Pedogenesis
(D) All of these
| Answer :- (C) |
14. Xerophyte Contains :
(A) Deep roots
(B) Sunken stomata
(C) Thick cuticle
(D) All of these
| Answer :- (D) |
15. During food chain the maximum energy is stored in :
(A) Producers
(B) Decomposers
(C) Herbivoures
(D) Carnivoures
| Answer :- (A) |
16. Ecological pyramids were first devised by :
(A) Charles Elton
(B) R. Hesse
(C) R. A. Lindemann
(D) Justus von Liebig
| Answer :- (A) |
17. In the phosphorus cycle, weathering makes phosphate available first to :
(A) Producers.
(B) Decomposers
(C) Consumers
(D) None of these
| Answer :- (A) |
18. Which types of the following pyramid are never inverted ?
(A) Pyramid of energy
(B) Pyramid of biomass
(C) Pyramid of number
(D) Pyramid of dry biomass
| Answer :- (A) |
19. Biosphere means :
(A) Atmosphere
(B) Lithosphere and ionosphere
(C) Atmosphere, lithosphere and hydrosphere
(D) Hydrosphere, l.ithosphere and ionosphere
| Answer :- (C) |
20. Decomposers are
(A) Autotrophs
(B) Autohetrotrophs
(C) Organotrophs
(D) Heterotrophs
| Answer :- (D) |
21. The largest ecosystem is :
(A) Forest ecosystem
(B) Marine ecosystem
(C) Pond ecosystem
(D) Grassland ecosystem
| Answer :- (B) |
22. Ecology deals with :
(A) The earth and plants
(B) The relationship between organisms and their environment
(C) Economical growth of poor people
(D) The life under sea
| Answer :- (B) |
23. Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis ?
(A) Less than 1%
(B) 2-10%
(C) 30%
(D) 50%
| Answer :- (B) |
24. Climax community is in a state of :
(A) non-equilibrium
(B) equilibrium
(C) disorder
(D) constant change
| Answer :- (B) |
25. The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called :
(A) Pelagic zone
(B) Benthic zone
(C) Lentic one
(D) Littoral zone
| Answer :- (D) |
26. Edaphic factor refers to
(A) water
(B) soll
(C) relative humidity
(D) attitude
| Answer :- (B) |
27. The main source of energy in ecosystem :
(A) Green plants
(B) Sun
(C) Wind
(D) All the above
| Answer :- (B) |
28. Flow of energy in food chain of an Ecosystem is :
(A) Unidirectional
(B) Bidirectional
(C) Multidirectional
(D) None
| Answer :- (A) |
29. Tiger is a consumer of:
(A) Primary
(B) Secondary
(C) Tirtiary
(D) None of these
| Answer :- (B) |
12th biology objective questions and answers in English, 12th biology objective questions and answers in English 2021, 12th biology objective questions and answers pdf in English, Chemistry Objective question 12th 2021, Bihar Board 12th Biology Objective Question Sexual Reproduction in Flowering Plants Chapter, 12th Biology ka objective question 2021, Biology ka objective question 12th, 12th biology objective questions and answers in English 2020, 12th biology objective, Class 12th Biology Most VVI MCQ Objective Chapter Wise Question in English on New Pattern, BSEB Inter Exam 2021 Biology Objective Question Set10th board, Class 12th Exam Science Stream Biology VVI Objective Type Question Ecosystem Chapter
IMPORTANT LINKS –
| 10TH 12TH MOBILE APP | |
| Class 10th | CLICK |
| Class 12th | CLICK |
| 10th Mobile App | CLICK |
| 12th Mobile App | CLICK |
| 12TH BOARD SCIENCE STREAM | |
| Physics | CLICK |
| Chemistry | CLICK |
| Biology | CLICK |
| Mathematics | CLICK |
| Hindi 100 | CLICK |
| English 100 | CLICK |
Class 12th Biology VVI Objective Question in English Sexual Reproduction in Flowering Plants Chapter, BSEB Inter Exam Biology Chapter wise Objective Question New Pattern, Bihar Board 12th Biology Objective Question Sexual Reproduction in Flowering Plants Chapter, Class 12th Exam Biology VVI Objective Question Human Reproduction Chapter, 12th Board Exam Biology Most VVI MCQ Question Reproductive Health Chapter, Class 12th Board Exam Biology Important Chapter Wise MCQ Question in English, BSEB Inter Exam Biology Important MCQ Question Evolution Chapter in English, Class 12th Biology VVI Objective MCQ Human Health and Diseases Chapter in English, Class 12th Exam Biology Chapter Wise Objective MCQ Question in English, Class 12th Biology Most VVI MCQ Objective Chapter Wise Question in English on New Pattern, BSEB Inter Exam Biology Chapter Wise Objective MCQ Question in English