In the spring before the leaves come out,maple trees are often tapped to collect sap to make syrup.The sugars were stored in the wood of the tree as starch and then released as temperatures rise above freezing in late winter.Which of the following best describes the original source of the sugars found in the sap?
A) photosynthesis during the previous summer
B) photosynthesis that winter
C) photosynthesis occurring in the spring while the sap is flowing
D) breakdown of cellulose in the tree
E) absorption from the soil

Question

Quizplus · Accepted Answer

Sugars stored through the winter must have been made by the plant during the previous growing season, since plants are autotrophs.

In the Spring Before the Leaves Come Out,maple Trees Are