The class wants to design an experiment to answer the question, "What amount of water will cause the plants to produce the greatest number of peas?" What could the class do to create the experiment?

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

the missing space is phylum