Q.1
Given below are two statements
Statement (I) : De Saussure concluded that the carbon contained by pants was derived from the soil
Statement (II) : Sir Humphry Davy stated that plants received most of the carbon from atmoshperic air.
In light of the above statements, choose the most appropriate answer from the options given below.
EXPLANATION
Micronutrient Chemistry (Fe, Mn, Zn, Cu, B, Mo): Ionic Strength, Availability Indices & Chelation Equilibria
- Statement I is false: Nicolas-Théodore de Saussure (1804) conclusively proved through quantitative experiments that plants absorb carbon dioxide ($CO_2$) from the atmospheric air during photosynthesis, disproving the ancient Humus Theory which erroneously claimed that plants derived carbon from soil organic matter.
- Statement II is false: Sir Humphry Davy (1813) originally supported aspects of the humus theory in his early lectures, stating that plants could take up soluble carbonaceous compounds from soil through their roots.
- Conclusion: Both Statement (I) and Statement (II) are false. (Correct answer: Option 2)
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