Question

The first important biological investigation, which led to the conclusion that plant makes its substance from water and not from soil carried out by

• A. Lamarck
• B. De Vries
• C. Van Helmont
• D. Darwin

Answer 1

The correct option is C Van Helmont

Von Hemont did not discover photosynthesis, but his famous experiment with the willow tree planted in a measured fixed amount of soil over several years gave a very good hint for others to conclude. Von Helmont found that the tree gathered weight by being nourished with water, but the weight gain was not coming from the soil the tree was planted in, but for some parts of it from the water used for irrigation.

So, the correct answer is option C.