Why is dna replication called semiconservative?

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Discuss the functions of epithelial connective nerviud and muscular tissues