In the early 1600s, Jean-Baptiste van Helmont planted a 5-pound willow sapling in 200 pounds of soil. He let it grow for five years, giving it only water. At the end of five years, the tree weighed 169 pounds, 3 ounces, and the soil weighed 199 pounds, 14 ounces. Where did the tree get the additional weight?

+1 vote

 

  

Most of the increased weight came from water.

  

Most of the increased weight came from nutrients in the soil.

  

Most of the increased weight came from carbon dioxide in the air.

  

All of the increased weight came from carbon dioxide in the air.

 

asked Dec 31, 2012 in Biology by anonymous
    

1 Answer

0 votes

 

Most of the increased weight came from carbon dioxide in the air.

 

answered Dec 31, 2012 by anonymous

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