Question

explain me the just 1 st one only not 2

Answer 1

All living organisms, including plants, get the energy they need to live from a chain of chemical reactions called respiration. The process of respiration needs glucose to start the reactions which is then converted into energy while producing carbon dioxide and water as by-products. It is important to note here that respiration is not equal to breathing. Breathing is just a part of respiration, which takes place in animals, but plants do not breathe. Let’s have a glance of the process of respiration in plants.

Respiration in Plants

During respiration in plants, very little transport of gases takes place from one plant part to another. Therefore, each plant part takes care of its own energy needs, or in other words, its gas exchange need. Roots, stems andleaves of plants exchange gases for respiration separately. We already know, leaves of plants have tiny pores called stomata, which is used for the exchange of gases. The oxygen, taken in through stomata is used by the cells in the leaves to break down glucose into carbon dioxide and water.



Respiration in Plants

Similarly, roots of plants take in air from the air spaces present between the soil particles. Thus, the oxygen absorbed through roots are used to release energy. And energy is utilised for the transport of minerals and salts from the soil.



We are aware of the fact that plants have the unique ability to photosynthesise.Photosynthesis is the process through which plants prepare their own food. It takes place only in the parts of plants that containchlorophyll, i.e. only in the green parts of the plants. The process of photosynthesis is so prominent that it sometimes masks the process of respiration in plants. However, we must know that respiration in plants occurs throughout the day while photosynthesis takes place only in the presence of light. Therefore, at night the respiration in plants becomes prominent. That is why we often hear that people are asked not to sleep under a tree at night . This may cause suffocation due to the excessive presence of carbon dioxide released by trees as a result of respiration.