Question

9/10
these two cycles help
provide the necessary
elements needed for dna
and proteins
phosphorus cycle and nitrogen cycle
water cycle and carbon cycle
nitrogen cycle and carbon cycle
nitrogen cycle and water cycle

Explanation:

DNA contains phosphorus (in its phosphate groups) and nitrogen (in its nitrogenous bases), and proteins also contain nitrogen (in amino groups). The Phosphorus Cycle and Nitrogen Cycle are involved in providing these elements for DNA and protein synthesis. The Water Cycle deals with water movement, and the Carbon Cycle with carbon, which are not the key elements for DNA/protein as phosphorus and nitrogen are.

Answer:

A. Phosphorus Cycle and Nitrogen Cycle