Demographic transitions is change from high birthrates and high death rates to

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 of the following is a macronutrient? carbohydrates lipids amino acids all of the above

Nucleic acid certain protein cell membranes certain carbohydrates