The phosphorus cycle differs from the biogeochemical cycles in that A. it does not have an atmospheric reservoir.
B. it does not have an oceanic reservoir.
C. there is no assimilation of phosphorus.
D. there is no decomposition of phosphorus.

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

Which element provides strength to the exoskeleton of clams and oysters

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer