Which of the following is a FALSE statement? Select one:

RNA contains the nitrogen base cytosine.

RNA contains the nitrogen base guanine.

RNA contains the nitrogen base thymine.

RNA contains the nitrogen base uracil.

3rd one

Explanation:

because only DNA contain thymine and in RNA it contains uracil.

i am going to guess that it is co2.

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.