In all forms of life, which molecule codes information about physical traits? A large molecule called codes information about physical traits. The units of information in that large molecule are called .

1. deoxyribonucleic acid, 2. genes

Explanation:

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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.