A food chain has the following trophic levels:
A.3 or 4
B.3
C.2
D.1
Category: Ecology and General Silviculture Mcqs
The main role of bacteria in the carbon cycle involves:
A.Photosynthesis
B.Assimilation of nitrogenous compounds
C.Chemosynthesis
D.Digestion or breakdown of organic compounds
According to Lindemann, the total solar input in terms of gcal/cm2/year is:
A.112,887
B.118,872
C.181,872
D.112,788
The gross production minus losses in an ecosystem is indicated as:
A.Net production
B.Secondary production
C.Net storage
D.Net primary production
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
Niche of a species in an ecosystem refers to its:
A.Place of occurrence
B.Competitive ability
C.Centre of origin
D.Function at its place of occurrence
Sulphur is returned to the soil by:
A.Producers only
B.Producers and consumers
C.Consumers and decomposers
D.All of these
Which of the following is the smallest unit?
A.Biosphere
B.Ecosphere
C.Ecosystem
D.Biome
Food levels in an ecosystem are called:
A.Trophic levels
B.Consumer levels
C.Producer levels
D.Herbivores levels
The ecosystem lying in the alpine zone between taiga and polar ice is called:
A.Savana
B.Autotrophic
C.Heterotrophic
D.Tundra
