The gaseous exchange in plants takes place through leaves by the diffusion process, and it is regulated by the stomata. Utricularia, Hydrilla, etc., are some aquatic underwater plants. How does gaseous exchange take place in such plants?

Lime water combines with carbon dioxide to produce a milky appearance. In Beaker A, Rahul uses a syringe to inject natural air into the lime water, and in Beaker B, he blows air into the lime water through his mouth. Which beaker's limewater will start to turn milky first? Justify your response.

The respiratory system is the organs and other parts of your body involved in breathing when you exchange oxygen and carbon dioxide. Rita wrote the part of the human respiratory system in sequential order. 

Do you think this is correct? If not then rewrite with proper sequential order.

This is the image of the lungs. But it is not the perfect image. Why? Explain your answer and also mention the correct image for it.