A. Net primary productivity
B. Gross secondary productivity
C. Net secondary productivity
D. Gross primary productivity
Related Mcqs:
- The taiga ecosystems lie in the:
A. Alpine zone
B. Sub-alpine zone
C. Temperate zone
D. Sub-tropical zone - The living organisms of all ecosystems collectively constitute:
A. Producers
B. Decomposers
C. Consumers and decomposers
D. Biosphere - Short and simple food chains are rare in the world and may be found in simple ecosystems like:
A. Savanna
B. Tundra
C. Grassland
D. Desert - Fragile ecosystems cover:
A. The arid and semi-arid zones of the world, arid savannas of the tropics, the slopes of the mountains of the tropics
B. And subtropics and forest areas of the developing world under shifting cultivation have been described as ‘Fragile Ecosystems’
C. Because their equilibrium appears to be easily upset and because they become ecologically degraded if certain forms of land use
D. All of the above - The percentage of light energy utilized for photosynthesis by higher plants is:
A. 100
B. 50
C. 10
D. 1 - Energy flow and energy transformations in living systems strictly conform to the:
A. Law of limiting factors
B. Liebig’s law of minimum
C. Laws of thermo dynamics
D. Shelford’s law of tolerance
E. Biogenetic law - The ration of food energy assimilated to the food energy ingested is called:
A. Trophic level efficiency
B. Photosynthetic efficiency
C. Net production efficiency
D. Assimilation efficiency - The transfer of energy from one trophic level to another is governed by the 2nd law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is:
A. 25%
B. 50%
C. 10%
D. 5% - The rate of storage of food energy at consumer level is called:
A. Secondary productivity
B. Primary productivity
C. Gross productivity
D. Net productivity - With the construction of Thal irrigation canal, about _____ sand dunes have been converted into highly productive cultivated areas:
A. 1 m ha
B. 2 m ha
C. 3 m ha
D. 4 m ha
The correct answer to the question: "The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem’s:" is "Gross primary productivity".
