Explain why blood tests can be used to rule out potential parents, but cannot prove who the parents of a child are.

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

What is one affect on the australian environment due to the introduction of non-native european rabbits

Which gas prevents the spread of fire and extinguishes it? is a type of compressed gas that prevents the spread of fire and extinguishes it.