While scientists have known of dna's existence for much longer, until 1985 they didn't know that the dna of each person differed.

true or false

The statement is false

Explanation

the statement is wrong because the structure of DNA was discovered in 1953 by  James Watson and Francis Crick and they explained it very well. till 1985 everything about the structure of DNA was very well known and the scientist knew that the DNA of each person differs from each other.

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.