Why are isotopes with short half-
lives not useful for dating very
old rocks?

What are the probable phenotypes of their offspring

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

Which organ controls breathing? lungs alveoli heart diaphragm