The swollen underground structure in an onion is known as .........

Select the correct option for the $Opuntia$ (prickly pear cactus) plant regarding the function of leaves and stems.

The smallest cladode is reported in:

In $Duranta$,axillary buds and in $Carissa$ the apical bud is modified into stem thorns. What is correct for $Ulex$? It has

The rhizome of ginger resembles the roots of other plants as it grows underground. Despite this fact,ginger is a stem and not a root. Justify.

The edible part of $Brassica$ $oleracea$ variety $capitata$ is .....