A. CO2 of carbonic rocks
B. Atmospheric CO2
C. Fossil fuel
D. All of the above
Related Mcqs:
- The non-green plants are as important as the green plants because they:
A. Cause human disease
B. Cause diseases of other plants
C. Are useful in several industries
D. Bring about decomposition of dead animals and plant remains - 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 - Nitrogen oxides produced from the emission of automobiles and power plants, are the source of fine air borne particles which lead to:
A. Photochemical smog
B. Dry acid deposition
C. Industrial smog
D. Wet acid deposition - Those chemicals which are produced by plants and affect other plants are broadly called:
A. Depresants
B. Allomones
C. Allelochemics
D. Kairomones - Among the plants listed, point out one that does not fit into ecological group represented by the other plants:
A. Acacia
B. Aloe
C. Euphorbia
D. Rhizophora - Among the plants listed, point out one that does not fit into biological group represented by other plants
A. Euphorbia
B. Acacia
C. Vallisneria
D. Aloe - Which of the following is logical sequence of carbon cycle:
A. Photosynthesis-consumer-decomposer
B. Decomposer-consumer-photosynthesis
C. Photosynthesis-decomposer-consumer
D. Consumer-photosynthesis-decomposer - Which of the following is non-renewable source of energy:
A. Mineral
B. Water
C. Forest
D. Solar energy - Which one of the following is a reversible source of energy?
A. Petroleum
B. Coal
C. Nuclear fuel
D. Trees - A hydrocarbon having the following number of carbon atoms doesn’t exist freely in the atmosphere:
A. C16
B. C18
C. Both (a) & (b)
D. C10
The correct answer to the question: "Which of the following serves as source of carbon in plants:" is "Atmospheric CO2".
