What is a shooting star, a comet or a meteor burning in our Earth’s Atmosphere?

There are six elements that make up most of the human body. which of the following is not one of these six elements?

When does dna replication(make a copy of itself)?

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13