Tap roots are commonly found in

Which of the following is a correct statement?

Rhizophora is an example of

The root hairs in plant roots are formed from which cells?

The edible part of a sweet potato is:

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?