What are outside raw materials used for by an organism?
Outside raw material is used by organism for food and oxygen. Raw materials requirement varies on the complexity of the organism and the environment it is living
Enzymes secreted in small intestine.
Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.
What are the differences between the transport of materials in xylem and phloem?
Describe double circulation of blood in human beings. Why is it necessary?
What would be the consequences of a deficiency of haemoglobin in our bodies?