Plants also do respiration
We know
that during daylight (or artificial light, except green) plants carry out
photosynthesis and release OXYGEN. Like
animals, plants also require energy to live and grow. This energy comes
from glucose during respiration. Respiration uses oxygen and give up
carbon dioxide. To demonstrate this, we can do the following: Diagram of
enclosed plant and related graph! The graph
shows that the level of oxygen rises in the daytime. This is due to photosynthesis producing more oxygen than the plant's respiration
using it up. The level of oxygen falls during night due to the plant's
respiration using it up and no more is being produced as there is no
photosynthesis happening. The amount of oxygen rises
gradually, over the period of time. The level of
CO2 falls during day time due to photosynthesis using it
up. However, it rises at night because of respiration. On the whole
the level of CO2 falls since the plant use up more CO2 than it produces.
Test your understanding of how plants release energy to stay alive. 1. When does respiration occur in plants? 2. What are the reactants needed for aerobic respiration? 3. Through which structures on the leaf do gases move in and out? 4. Why is respiration essential for plant cells? 5. Which statement is true about gas exchange in plants during the night?🍃 Knowledge Check: Respiration in Plants
Click to Reveal Answers
2. Glucose and oxygen (These react together to release energy).
3. Stomata (Tiny pores usually found on the underside of the leaf).
4. To release energy from glucose (Energy is needed for life processes).
5. They take in oxygen and release carbon dioxide (Because only respiration happens at night).
Tags:Photosynthesis, Oxygen, Carbon dioxide, Respiration