Two elements always present in organic compounds?

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 organism in this food web is an omnivore?coati

Consider the activity and specificity of the three enzymes. pepsin is most active in the human and to digest