The roots can absorb oxygen from the small air spaces in the soil.
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 marsh lands or swamps obtain their O2 required for root respiration?
From where do the plants get carbon, oxygen and hydrogen? What do plants need nutrients for? [3 MARKS]
Have you ever thought how do aquatic plants and animals survive? From where do they get oxygen? [3 MARKS]