REMOVAL OF EXTRA CARBON DIOXIDE IN PLANTS [ CHAPTER 2 ( HOMEOSTASIS) CLASS 10]

 REMOVAL OF EXTRA CARBON DIOXIDE ITS SIGNIFICANCE, 

CONTENT:

• REMOVAL OF EXTRA CARBON
• MORE INFORMATION 
• SIGNIFICANCE OF CARBON DIOXIDE
• ADVANTAGES
• HARMFUL EFFECTS
• 
  

HOW EXTRA CARBON DIOXIDE IS REMOVED BY PLANTS?

ANSWER

DURING DAY TIME

In day time , the carbon dioxide produced during cellular respiration is utilized in photosynthesis and hence, it is not a waste product.

                               

DURING NIGHT TIME

At night , it is surplus because there is no utilization of carbon dioxide . It is removed from the tissue cells by diffusion    .

LEAVES AND STEMS

In leaves and young stems, carbon dioxide escapes out through stomata

REMOVAL OF OXYGEN

Oxygen is produced in mesophyll cells only daytime, as a by-product of photosynthesis    .After its utilization  in cellular respiration , the mesophyll cells reove the extra amount of oxygen through stomata.

              FOR INFORMATION

SIGNIFICANCE OF EXTRA CARBON DIOXIDE

It is significant that so much carbon dioxide stays in the atmosphere because CO₂ is the most important gas for controlling Earth's temperature. Carbon dioxide, methane, and halocarbons are greenhouse gases that absorb a wide range of energy—including infrared energy (heat) emitted by the Earth—and then re-emit it

ADVANTAGES OF CARBON DIOXIDE

One of the expected benefits from rising atmospheric carbon dioxide is that plants may use less water and avoid some of the damaging effects of drought. The basis for this effect is that plants close the pores called stomata on their leaves and less water is taken from the soil out through the plant and into the air

PROBLEMS CAUSED BY EXTRA CARBON DIOXIDE

Exposure to CO2 can produce a variety of health effects. These may include headaches, dizziness, restlessness, a tingling or pins or needles feeling, difficulty breathing, sweating, tiredness, increased heart rate, elevated blood pressure, coma, asphyxia, and convulsions