What role does bile play in digestion?

$(a)$ Draw the structure of a nephron and label the following parts on it:
$(i)$ Renal artery
$(ii)$ Bowman's capsule
$(iii)$ Glomerulus
$(iv)$ Collecting duct
$(b)$ Name four substances in the initial filtrate which are selectively reabsorbed as the filtrate flows along the tubule.

How do carbohydrates,proteins,and fats get digested in human beings?

Name any two digestive enzymes secreted in the human digestive system and write their functions.

In $Xylem$,minerals in solution form move in both directions (upward and downward).

Match Group $(A)$ with Group $(B)$:

Group $(A)$	Group $(B)$
$(a)$ Autotrophic nutrition	$(i)$ Leech
$(b)$ Heterotrophic nutrition	$(ii)$ Paramecium
$(c)$ Parasitic nutrition	$(iii)$ Deer
$(d)$ Digestion in food vacuoles	$(iv)$ Green plant