Most of the gas about 72 percent is hydrogen. Nuclear fusion converts hydrogen<span> into other elements. The sun is also composed of about 26 percent </span>helium<span> and trace amounts of other elements </span>oxygen<span>, carbon, </span>neon<span>, </span>nitrogen,magnesium<span>, iron and silicon.</span>
Biotic and abiotic because it’s like living and non living
circulatory
The lungs and respiratory system work closely with the circulatory system to make sure oxygen reaches all the cells of our body.
Answer:
Nitrogen-fixing bacteria are prokaryotic microorganisms that are capable of transforming nitrogen gas from the atmosphere into “fixed nitrogen” compounds, such as ammonia, that are usable by plants.
Explanation:
