You obtain a box of pine branches and cones from pocahontas state park and you indentify two species based on observable features. you have used the:
a.
biological species concept
b.
ecological species concept
c.
phylogenetic species concept
d.
morphological species concept

it will be bbb bbb bbb bbb bbb bbb bbb bbb

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.