What type of galaxies do scientist believe to be the youngest in our universe A. Rich galaxies
B. Nuclear galaxies
C. Spiral galaxies
D. Irregular galaxies

C. Spiral Galaxies is the answer

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse

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.