What happens in the cyclization process of glucose and why is the straight form of glucose more reactive than the ring/cyclic form

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources? (site 1)

If the coding part of an mrna molecule is 1800 nucleotides (bases) in length, this molecule will contain codons and code for a polypeptide that is amino acids long.

Are the earth's ocean floor and continents the same age geologically? why or why not?