Diversity of life on earth is included in which central and unifying theme of biology?

Evolution

Evolution is considered a unifying theory of biology. It explains the unity and diversity of life.

b is dominant over the allele for the white fur.

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.