Question

question 9 (5 points) listen which biogeochemical cycle is used in the creation of nucleic acids? a) primary productivity b) water cycle c) nitrogen cycle d) phosphorus cycle question 10 (5 points) listen pb has an atomic mass of 82. if an atom of that element has an atomic mass of 80, that atom is known as a) an isotope. b) a stereoisomer. c) magnetic. d) radioactive.

Explanation:

For Question 9, nucleic acids contain phosphorus in their structure, and the phosphorus cycle is involved in the availability of phosphorus for the creation of nucleic acids. For Question 10, isotopes are atoms of the same element with different atomic masses due to different numbers of neutrons. An atom of an element with an atomic mass different from the standard atomic mass of that element is an isotope.

Answer:

Question 9: D. Phosphorus cycle
Question 10: A. an isotope.