11. Which of the following uses maximum energy?
A. Primary comsumer
B. Secondary consumer
C. Decomposer
D. Primary Producers
Answer : Option D
12. Through, whoch of the following, enery enters in an ecosyslem?
13. Why is algae placed in first place of food chain ?
A. Algae is first to synthesize food.
B. Algae is first to consume food.
C. Every living organisam can utilize food.
D. None of the given.
Answer : Option A
14. In which of the following wheat eating pegions included ?
A. Decomposer
B. Primary consumer.
C. primary producers
D. secondary consumer.
Answer : Option B
15. which of the following is placed in upper most (highest) level of ecological pyramids.
A. Herbivores
B. Carnivors
C. Primary and Secondary Producers.
D. Primary and Secondary consumer.
Answer : Option B
16. As we proceed in food chain, bio-mass.....
A. Remain Same
B. Decreases
C. Increases
D. Initially same and later keep decreasing.
Answer : Option B
17. In ecosystem the source of energy is....
18. Who is primary consumer of biotic community ?
A. Herbivores/ Grazing animal
B. Omnivores
C. Scavengers
D. Carnivores.
Answer : Option A
19. In which of the following weeds are placed ?
A. Primary producers
B. Secondary consumer.
C. Primary consumer.
D. Decomposer.
Answer : Option A
20. When does the energy flow start in an ecosystem ?
A. When material cycle starts
B. When sun rises
C. When any living organisam gain food.
D. When light energy is converted in chemical energy.
Answer : Option B