The maximum amount of electrolytes and water ($70-80$ percent) from the glomerular filtrate is reabsorbed in which part of the nephron?

In a galvanometer,$5 \%$ of the total current in the circuit passes through it. If the resistance of the galvanometer is $G$,the shunt resistance $S$ connected to the galvanometer is

Which of the following organisms is not correctly matched with its taxonomic category?

The salivary gland chromosomes in the dipteran larvae are useful in gene mapping because

In which of the following animals does the maximum mixing of oxygenated and deoxygenated blood occur in the ventricles?

$A$ and $B$ are two concentric circular loops carrying currents $i_1$ and $i_2$ as shown in the figure. If the ratio of their radii is $1:2$ and the ratio of the magnetic flux densities at the centre $O$ due to $A$ and $B$ is $1:3$,then the value of $\frac{i_1}{i_2}$ will be: