Which of the following plants is used to extract the blue dye?

Many pulses of daily use belong to one of the families below (tick the correct answer)

The placenta is attached to the developing seed near the

Match the following and choose the correct option

Options:

Roots obtain oxygen from air in the soil for respiration. In the absence or deficiency of O2, root growth is restricted or completely stopped. How do the plants growing in marshlands or swamps obtain their O2 required for root respiration?