1. Controlling factor in ecosystem is :
(A) Soil moisture
(B) Food
(C) Predation
(D) Temperature
Answer-( C )
2. Bacteria and Fungi are :
(A) Scavengers
(B) Primary consumers
(C) Secondary consumers
(D) Decomposers
Answer-( C )
3. Decomposers are :
( A ) Animalia and Morera
( B ) Protista and Animalia
( C ) Fungi and Plantae
( D ) Bacteria and Fungi
Answer-( D )
4. In a biotic community primary consumers are :
(A) Carnivores
(B) Detrivores
(C) Herbivores
(D) Omnivores
Answer-( C )
5. What will happen if decomposers will be destroyed from the ecosystem?
(A) Energy flow will stop
(B) Flow of minerals will stop
(C) Rate of decomposition will increase
(D) Photosynthesis will stop
Answer-( B )
6. The trophical evergreen forest is
found in :
(A) Himalaya
(B) Western Ghat
(C) Arawali
(D) Assam
Answer-( B )
7. Pyramid of Energy is
(A) Always upright
(B) Always inverted
(C) Both upright & inverted
(D) Spindle-shaped
Answer-( A )
8. The driving force for an ecosystem is
(A) Producers
(B) Biomass
(C)Carbohydrates present in producers
(D)Solar energy
Answer-( D )
9. Carnivores represent :
(A) Primary consumers
(B) Secondary and Tertiary consumers
(C) Secondary consumers
(D ) Primary producers
Answer-( B )
10. Which in the following has maximum Biomass ?
(A) Temperate forest
(B) Tropical rain forest
(C) Alpine vegetation
(D) Taiga
Answer-( B )
11. A lake ecosystem is
( A ) artificial
( B ) abiotic
( C ) natural
( D ) water bodies
Answer-( D )
12. The correct sequence of a common food-chain is
( A ) Grass – Goat – Man
( B ) Goat Grass – Man
( C ) Man Goat Grass
( D ) None of above
Answer-( A )
13. The highest number of which of the following is in a food-chain ?
( A ) Producer
( B ) Primary consumer
( C ) Secondary consumer
( D ) Decomposer
Answer-( A )
14. The pyramid of number in a forest Ecosystem is
( A ) Upright
( B ) Inverted
( C ) Both
( D ) None
Answer-( B )
15. Treeless genome is called
( A ) Tundra
( B) deserts
(C) Grassland
(D) All of above
Answer-( D )
16. The energy flow of food chain in an ecosystem is
(A) Unidirectional
(B) Bidirectional
(C) Multidirectional
(D ) None of above
Answer-( A )
17. which in the following is Hydrophyte?
(A) Singhara
(B) Opuntia
(C) Sesame
(D) Acacia
Answer-( A )
18. Which in the following is the insectivorous plant ?
(A) Drosera
(B) Nepenthes
(C) Both (A) and (B)
(D) Hydrilla
Answer-( C )
19. If co, is removed from biosphere then the first bad impact will be on which organisms :
(A) Primary Producer
(B) Primary consumer
(C) Secondary consumer
(D) Tertiary consumer
Answer-( A )
20. The term ‘Ecosystem’ was proposed by :
(A) Gardener
(B) Odum
(C) Tansley
(D) Warming
Answer-( C )
