A. Food chains
B. Biological control
C. Natural barriers
D. All the above
Related Mcqs:
- 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% - Due to modification of the environment by the plant community itself, when one community is replaced by another suitable community, the succession is called:
A. Induced
B. Deflated
C. Allogenic
D. Autogenic - The transfer of food energy from the source in plants through a series of organism with repeated stages of eating and being eaten is known as:
A. Food web
B. Food chain
C. Food cycle
D. None of these - Energy transfer from one trophic level to other in a food chain is:
A. 1%
B. 2%
C. 10%
D. 20% - Ten percent law of energy transfer, in a food chain was enunciated by:
A. Elton
B. Heackel
C. Lindeman
D. Schimper - The transfer of food energy from the sources in plants through a series of organisms with repeated stages of eating and being eaten is known as:
A. Food way
B. Food web
C. Food link
D. Food chain - 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 rate at which light energy is converted into chemical energy of organic molecules is the ecosystem’s:
A. Net primary productivity
B. Gross secondary productivity
C. Net secondary productivity
D. Gross primary productivity - In a food chain, the initial organism is:
A. Herbivore
B. Photosynthesis
C. Carnivore
D. Symbiotic
