What is the main function of the leaf (one word)?

Adenosine triphosphate (ATP) is composed of an adenine, a ribose, three phosphate molecules, and the bonds between molecules. When the ATP is broken down, which part is removed to release the stored energy? 

At present the number of elements naturally occurring on earth is __________.

The vascular cambium produces tissues that increase the girth of a plant.

The openings in the leaves where gas exchange occurs (CO2 comes in and O2 goes out) is called the ____________

In lab, you need to quickly teach your assistants to differentiate between plant and animal cells. Which structure would not allow plant and animal cells to be differentiated?

Which tissue is derived from the apical meristem?

As living individuals grow and reproduce their response to environmental stimuli may include __________.

Sugars produced in photosynthesis are “loaded” into the __________ of the leaf for transport throughout the plant.

As you investigate unknown cells through the microscope, you note a structure that immediately allows you to eliminate the possibility that the unknown cells are animal cells. What is this structure?