1. What is another name for biogeochemical cycles? 2. What is Nutrient?
3. Differentiate between macronutrient and micronutrients? Give
some examples of each type.
4. What did the law of conservation of matter say?

Substances that living organism obtained from food substances consumed for effective  biochemical reactions of the body are called nutrients.Theses substances are produced  in cells of living organisms,they are therefore obtained from the food substances consumed.When they  are needed in large amounts for survival of living organisms they are called Macro nutrients or essential nutrients-CHO,proteins fatty acids  are examples but in smaller amounts as micro nutrients,because they are needed for the general well being,thus living organism can survive without them-Ca,K,Zn,Mg are examples,

The law of conservation matter- Matter in any chemical reactions the total mass of the product must be equal in proportion to that of the reactants.Thus the mass in the reaction must be constant,

Biogeochemical cycles;this is also known as substances turn over,It is the exchange of elements and compounds between the living organism and their immediate environments.

Thus living  organisms obtained substances in the food chain as this is moved from one trophic levels to another.These are used for different biochemical reactions. However,they are expanded  for  different biochemical activities ,excretion,respiration,locomotion and movements and  death and decomposition where after decay,are reabsorbed by the producers for the cycle to continue.

Explanation:

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.