Yes. A cell without a nucleus (that has been made without a nucleus) is called a prokaryotic cell. They lack nuclei or any other organelles that are membrane bound. Most are unicellular and their DNA is held in a nucleoid in the cytoplasm.<span />
Basically when doing exercise your body needs way more oxigen because it is using it up faster to be able to do the exercise. While also increasing the breathing rate, the heart rate also goes up because the body needs to pump more blood as the muscles are moving a lot more.
Answer:
Light bulb: electric to light.
Explanation:
