STD 11 - 6. Anatomy flowering plants — BIOLOGY STD 11 Science — Question

$II.$ Nitrogenous waste are absorbed by active transport

$III.$ Conditional reabsorption of $Na ^{+}$and water takes place in $DCT$

$IV.$ $DCT$ reabsorbs glucose

$V.$ $DCT$ is capable of selective secretion of $H ^{+}, K ^{+}$and $NH _{3}$ to maintain $pH$ and $Na ^{+}- K ^{+}$ balance in blood

$VI.$ Substances like glucose, amino acids, $Na ^{+}$, etc, in the filtrate are reabsorbed actively

Choose the option with incorrect statements

$R :$ Descending limb is impermeable to $Na^+$, while ascending limb is impermeable to $H_2O.$