Whydo the ecosystems at the north and south poleconsidered marine?

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.

me and my friend did 2

the growth of the plants is affected by the heat of the light. what is the student doing?