Haploid sperm and egg are produced via meiosis. what process is responsible for producing the 2n zygote? a) differentiation b) fertilization c) replication d) transcription

The process that produces the 2N or diploid chromosomes number in ANY organism that reproduces sexually is fertilization.

Meiosis produces sex cells or gametes that are N. When gametes unite, as seen here, during fertilization, the 2N number is restored.

B) fertilization

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.