MCQ ON ENERGY FLOW class 12 for NEET

MCQ ON ENERGY FLOW class 12 for NEET | ENERGY FLOW class 12 | MCQ ENERGY FLOW with Answer | Check the below NCERT MCQ question for class 12 Biology based on the with Answers.

MCQ on ENERGY FLOW class 12 Biology with answers were prepared based on the latest pattern.We have provided class 12 Biology MCQs questions on ENERGY FLOW with Answers to help students understand the concept very well.

MCQ ON ENERGY FLOW is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM 2022-23, 2023-24

Introduction:
Except for the deep sea hydro thermal ecosystem sun is the only source of energy for all ecosystems on earth. A incident solar radiation less than 50% of it is photosynthetically active radiation. We know that plants and photosynthetic bacteria fix suns radiant energy to make food from simple inorganic materials. Plant capture only 2-10 percentage of the PAR and this small amount of energy sustains the entire living world. So it is very important to know how the solar energy captured by plants flow through different organisms of an ecosystems. All organisms dependent for their food on producers, either directly or indirectly. So you find any direction flow energy from the Sun to Producers, then to consumers, further ecosystems are not exempt from the second law of thermodynamics, they need a constant supply of energy to synthesize the molecules they required to counter at the universal tendency to increasing disorderliness. The green plant in the ecosystem are called producers. In a terrestrial ecosystem , major producers are herbaceous and woody plants. Like wise produces in aquatic ecosystem are various species like phytoplankton ,algae and higher plants.

MCQ ON ENERGY FLOW class 12 for NEET

1. The green plant in the ecosystem are called

(a) producers
(b) consumers
(c) herbivores
(d) stratification

Ans (a) producers

2. All animals depend on plants directly or indirectly for their food needs , they are hence called

(a) consumers
(b) producers
(c) decomposers
(d) all the above

Ans. (a) consumers

3. We know that plants and photosynthetic bacteria fix suns radiant energy to make food from simple inorganic materials plants capture only of the…… . … photosynthetically active radiation (PAR) and this small amount of energy sustain entire living world

(a) 2-10 percentage
(b) 5-10 percentage
(c) 6-8 percentage
(d) 4-8 percentage

Ans. (a) 2-10 percentage

4. The consumer that feed herbivores are called

(a) primary carnivores
(b) secondary consumers
(c) both a and b
(d) none of the above

Ans.(c) both a and b

5. Those animals that depend on the primary carnivore for food are labelled

(a) secondary carnivores
(b) primary consumers
(c) productivity
(d) decomposers

Ans.(a) secondary carnivor se

6. The detrious food chain begins with the

(a) dead organic matter
(b) herbivorous
(c) primary consumers
(d) carnivorous

Ans.(a) dead organic matter

7. Decomposes which are heterotrophic organisms mainly

(a) bacteria and fungi
(b) bacteria and virus
(c) bacteria and algae
(d) bacteria and protozoa

Ans.(a) bacteria and fungi

8. In an ecosystem…………….. is the major conduit for energy flow.

(a) GFC
(b) DFC
(c) Producers
(d) all the above

Ans.(a) GFC

9. In a terrestrial ecosystem a much larger fraction of energy flow through …….. than through the GFC.

(a) DFC
(b) decomposers
(c) saprotrophs
(d) all the above

Ans. (a) DFC

10. The natural interconnection of food chains make it a

(a) decomposers
(b) foodweb
(c) trophic level
(d) standing crop

Ans. (b) food web

11. Based on the source of nutrition or food organism occupy a specific place in the food chain that is known as their

(a) trophic level
(b) primary consumer
(c) Parasitism
(d) Predatorship

Ans.(a) trophic level

12. The first trophic levels are

(a) herbivores
(b) primary consumer
(c) secondary consumer
(d) producers

Ans . (d) producers

13. Second and third trophic levels of food chain are

(a) herbivores and carnivores
(b) carnivores and parasite
(c) herbivores and predators
(d) carnivores and omnivores

Ans.(a) herbivores and carnivores

14. Amount of energy in a food chain …….. at successive trophic levels

(a) increasing
(b) decreases
(c) fragmentation
(d) leaching

Ans. (b) decreases

15.Each trophic level has a certain mass of living material at a particular time called as

(a) biomass
(b) standing crop
(c) DFC
(d) GFC

Ans.(b) standing crop

16. The number of troohic level in the grazing food chain is restricted as the transfer of energy flow, 10% law only- 10% of energy is transferred to its trophic level from lower trophic level.It is given by

(a) Lindemann
(b) Newton
(c) Edison
(d) Tansley

Ans.(a) Lindemann

17. In grazing food chain carnivores are

(a) primary producers
(b) secondary producers
(c) primary consumers
(d) secondary consumers

And.(d) secondary consumers

18. In an ecosystem standing crop at any time consists of

(a) total living matter
(b) total detritus
(c) both detritus and living matter
(d) total nutrients

Ans. (a) total living matter

19. Energy flow in ecosystem is

(a) unidirectional
(b) bidirectional
(c) multi directional
(d) stable

Ans.(a) unidirectional

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