¿a que llamamos uniones quimicas ?

Place the steps tor the formation of the enzyme pepsinogen in correct order

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

Individuals do not compete directly for resources, but are prey for the same predator