The plants in the were allowed to self-pollinate.

here's is your answer buddy

Explanation:

The plants in the F1 generation were allowed to self-pollinate. The plants in the P generation are true breeding.

did u get the answer? /? ? / me

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.