The organ in $Viscum$ that absorbs nutrients is known as:

Epiphyllous roots in $Begonia$ and $Bryophyllum$ are

Roots obtain oxygen from air in the soil for respiration. In the absence or deficiency of $O_{2}$,root growth is restricted or completely stopped. How do the plants growing in marsh lands or swamps obtain their $O_{2}$ required for respiration?

Velamen tissue is useful for absorption of water vapours from atmosphere in . . . . . . .

Buttress roots are

Hygroscopic roots occur in