True or false

Mutations are the ultimate source of genetic variation.

Explanation:

genetic variation is partially because of mutations, but mostly because of the random genes selected from your parents. so I wouldn't say its the ultimate source of genetic variation, but it is A source.

sea breeze

explanation:

cool air is going towards land allowing for the land to be cooler, the hotter air gets pushed away from the land.

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.