Which property of water is responsible for maintaining the homogeneity of the cytoplasm?

Excessive intake of vitamin $D$ leads to bone reabsorption and

What is the cause of the variations found in different species of living organisms?

Which of the following is an incorrect pair?

Match the following columns:

Column $I$	Column $II$
$(A)$ $NAD$	$(i)$ Nicotinamide Adenine Dinucleotide Phosphate
$(B)$ $NADP$	$(ii)$ Flavin Mononucleotide
$(C)$ $FAD$	$(iii)$ Nicotinamide Adenine Dinucleotide
$(D)$ $FMN$	$(iv)$ Flavin Adenine Dinucleotide

Identify the physical and chemical processes from the following:
$I - Ba(OH)_2 + H_2SO_4 \rightarrow BaSO_4 + 2H_2O$
$II -$ Ice $\rightarrow$ Water
$III -$ Water $\rightarrow$ Steam
$IV -$ Starch $\rightarrow$ Glucose
Which of these represent physical processes and chemical processes respectively?