Respiration In Plants MCQ - Practice Questions with Answers

• The plants require O2 for respiration to occur and they also give out CO2.
• Hence, plants have systems in place that ensure the availability of O2
• Plants, unlike animals, have no specialised organs for gaseous exchange but they have stomata and lenticels for this purpose.

Why Plants Can Get Along Without Respiratory Organs?

• First, each plant part takes care of its own gas-exchange needs. There is very little transport of gases from one plant part to another.
• Second, plants do not present great demands for gas exchange. Roots, stems and leaves respire at rates far lower than animals do.
• Third, the distance that gases must diffuse even in large, bulky plants is not great. Each living cell in a plant is located quite close to the surface of the plant.