You Plant a Seed into a Pot Containing Some Soil,and

Multiple Choice

You plant a seed into a pot containing some soil,and then add water and place the pot under a light.In the first week,before the seedling even emerged from the soil,carbon dioxide levels increased in the closed chamber.The developing plant was using which of the following as a source of energy during this first week?

A) Light
B) Starch from the seed
C) Water from the soil
D) Sugars from the soil
E) Nutrients from the soil