The spectrum of star x is compared to a reference hydrogen spectrum. what can be concluded about star x? star x is showing radial motion. star x is moving toward the earth. star x is moving away from the earth. star x may be moving, but its motion is not radial.

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

answeridentity;

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.