In an attempt to determine the source of a growing plant's mass, van Helmont planted a willow seedling in a pot of soil. After 5 years, the willow weighed 76.8 kg, and the soil had lost 0.06 kg of weight. Only water had been added to the pot. Which
conclusion should van Helmont have drawn?
A) Plants get their mass from water.
B) Plants get their mass from water and air.
C) Plants get their mass from water and atmospheric CO2.
D) Plants get all or almost all of their mass from a source other than soil.
Answer: D
You might also like to view...
What does the glucose molecule supply to cells?
What will be an ideal response?
The relationship between DNA and chromosomes is most like
a. an egg yolk inside of an egg. b. a spoon cradling some peas c. thread wrapped around a spool d. the candy shell surrounding the chocolate in a piece of M&M candy.
. The main forms of nitrogen taken up by plant roots and useful to plants is:
A. N-N B. nitrite C. nitrite and nitrate D. ammonia and N-N E. nitrate and ammonia
Assuming a cleft chin is dominant, the father’s genotype would be __________
a. Cc b. CC c. cc d. either Cc or cc