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Refer to the above diagram of energy pyr...



Refer to the above diagram of energy pyramid. The ecological efficiency at primary consumer level, in comparison to that at secondary consumer level, is

A

same

B

more

C

less

D

can not be ascertained from the data

Text Solution

Verified by Experts

The correct Answer is:
A
Ecological efficiency is the percentage of energy converted into biomass by a higher trophic level over the energy of food resources available at the lower trophic level. In both cases mentioned in the question, it will be 1/10.
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[A] : Energy pyramid is sloping . [R] : The energy of one trophic level is lower than another level as we go up .

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Transformer is a device used to increase or decrease the voltage in the transmission line according to requirement, Generally the input line voltage is fed in a primary coil and the output line voltage is obtained from the terminals of another coil In an ideal transformer, the primary and secondary coils are linked is such a way that there is no loss of magnetic flux and electrical energy. In an ideal transformer, if the number of turns and input voltage across the terminals of the primary coils be N_1 and V_1 , then the output voltage at the two terminals of the secondary coil V_2=V_1.N_2/N_1 , where N_2 is the number of turns in the secondary coil . In the above mentioned transformer the input and output currents are respectively.

Consider the following statements concerning food chains (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation (ii) Removal of most of the carnivores resulted in an increased population of deers (iii) The length of food chains is generally limited to 3 - 4 trophic levels due to energy loss (iv) The length of food chains may vary from 2 to 8 trophic levels Which two of the above statements are correct?

What type of ecological pyramid would obtained with the following data? Secondary consumer : 120 g Primary consumer : 60 g Primary producer : 10 g

Match List-I with List-II and select the correct answer using the codes given below the lists {:(,"List-I",,"List-II"),(A.,"The amount of energy accumulation in green plants through the process of photosynthesis",1.,"Gross primary productivity"),(B.,"The total organic matter synthesized by the producers in the process of photosynthesis per unit time and area",2.,"Primary productivity"),(C.,"Rate of storage of organic matter in plant tissues in excess of the respiratory utilization during the measurement period",3.,"Secondary productivity"),(D.,"Rate of energy storage at consumer level",4.,"Net primary productivity"):}

[A] : The rate of energy storage at consumer levels are referred to as primary productivities . [R] : Net primary productivity is the total gross productivity and the energy used up in the metabolic process .

[A] : There is a grudual increase in the energy content at successive trophic level from producer to consumers . [R]:When one organism benefits the other in a chain , it is called commensalism .

Calculate the quantity of electricity required to reduce 12.3g of nitrobenzene to aniline, if the current efficiency for the process is 50% . If the potential drop across the cell is 3.0 V,how much energy will consumed?

TRUEMAN BIOLOGY-ECOSYSTEM -MCQ
  1. Match list-I with list-II and select the correct answer using the code...

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  2. (A) 10 kcal//m^(2)//yr (B) 100 kcal//m^(2)//yr (C ) 1,000 kca...

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  3. Refer to the above diagram of energy pyramid. The ecological efficienc...

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  4. The stratification pattern in a community is well illustrated by a

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  5. In the absence of decomposers, ecosystem functioning is adversely affe...

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  6. The tendency towards increased variety and density of species at commu...

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  7. Climax communities

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  8. Both algae and fungi are not independently capable of initiating seral...

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  9. Match List-I with List-II and select the correct answer using the code...

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  10. Agroecosystem is unstable because of

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  11. Primary consumers in detritus food chain are

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  12. Putrefying organisms are

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  13. A pea-cock eats snakes which eat frogs. These eat hoppers which in tur...

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  14. Which of the food chain directly depends on solar radiations?

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  15. Converters or transducer organisms in the food chain are called

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  16. In parasitic food chain, the pyramid of number is

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  17. Ascending trophic level in grazing food chain pyramid represents

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  18. Phytoplankton are dominant in

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  19. Which ones are reservoirs of Phosphorus and Nitrogen cycles respective...

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  20. An organism contains carbon molecules which have passed through three ...

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