Choose the function of the pancreatic juice from the following:

The filtration units of kidneys are called:

Explain the three pathways of breakdown of glucose in living organisms.

During the respiration of an organism $A$,one molecule of glucose produces two $ATP$ molecules,whereas in the respiration of another organism $B$,one molecule of glucose produces $38$ $ATP$ molecules.
$(a)$ Which organism is undergoing aerobic respiration?
$(b)$ Which organism is undergoing anaerobic respiration?
$(c)$ Which type of organism,$A$ or $B$,can convert glucose into alcohol?
$(d)$ Name one organism which behaves like $A$.
$(e)$ Name two organisms which behave like $B$.

The blood leaving the tissues becomes richer in

Explain why transportation of materials is necessary in animals.