The organization of living organisms starts with which level?

$A$ circular coil having $N$ turns is made from a wire of length $L$ meters. If a current of $I$ amperes is passed through it and placed in a magnetic field of $B$ tesla,the maximum torque on it is

Charges of $2 \mu C$ and $-3 \mu C$ are placed at two points $A$ and $B$ separated by $1 \ m$. The distance of the point from $A$,where the net potential is zero,is (in $m$)

When acetaldehyde is reacted with $LiAlH_4$,what is the product formed?

On addition of $1 \ mL$ solution of $10\% \ NaCl$ to $10 \ mL$ gold sol in the presence of $0.025 \ g$ of starch,the coagulation is just prevented. The gold number of starch is:

An organic compound $A$ reacts with methyl magnesium iodide to form an addition product,which on hydrolysis gives compound $B$. Compound $B$ gives a blue color in the Victor Meyer test. What are compounds $A$ and $B$ respectively?