Get premium membership and access questions with answers, video lessons as well as revision papers.
Gaseous exchange takes place in spongy mesophyll
During the day air diffuses into large air spaces of spongy mesophyll through stomata
The carbon iv oxide in the air diffuses into the photosynthesis oxygen is produced
Some of the oxygen diffuses out of the leaf through stomata
During the night air diffuses out of air spaces of spongy mesophyll
The air dissolves into film of moisture
The oxygen in the air diffuses into cells and is used in respiration during which carbon iv oxide is produced
The carbon iv oxide diffuses out of the leaf through stomata due to diffusion/concentration gradient
At night carbon iv oxide accumulates in the leaf since photosynthesis does not take place
Some gaseous exchange also takes place through cuticle
Gaseous exchange occurs through epidermis of young leaves and stems
The cork cells at lenticels are loosely packed
Gaseous exchange takes place between cork and atmosphere within the loosely packed cell
Mohaissack answered the question on October 5, 2017 at 11:44
- State the ways in which leaves of plants are adapted to gaseous exchange(Solved)
State the ways in which leaves of plants are adapted to gaseous exchange
Date posted: October 5, 2017. Answers (1)
- What is the advantage of having stomata open during daytime and having them closed at night?(Solved)
What is the advantage of having stomata open during daytime and having them closed at night?
Date posted: October 5, 2017. Answers (1)
- Describe the mechanism of opening and closing of stomata(Solved)
Describe the mechanism of opening and closing of stomata
Date posted: October 5, 2017. Answers (1)
- Name the theories suggesting the mechanism of opening and closing of stomata(Solved)
Name the theories suggesting the mechanism of opening and closing of stomata
Date posted: October 5, 2017. Answers (1)
- State the factors which affect stomatal opening(Solved)
State the factors which affect stomatal opening
Date posted: October 5, 2017. Answers (1)
- Briefly describe the structure of stomata(Solved)
Briefly describe the structure of stomata.
Date posted: October 5, 2017. Answers (1)
- Why is gaseous exchange important to organisms?(Solved)
Why is gaseous exchange important to organisms?
Date posted: October 5, 2017. Answers (1)
- What is gaseous exchange?(Solved)
What is gaseous exchange?
Date posted: October 5, 2017. Answers (1)
- State the role of vaccination against certain diseases(Solved)
State the role of vaccination against certain diseases
Date posted: October 5, 2017. Answers (1)
- How does an allergic reaction occur?(Solved)
How does an allergic reaction occur?
Date posted: October 5, 2017. Answers (1)
- What are allergic reactions?(Solved)
What are allergic reactions?
Date posted: October 5, 2017. Answers (1)
- State the precautions that must be taken before blood transfusion(Solved)
State the precautions that must be taken before blood transfusion
Date posted: October 5, 2017. Answers (1)
- Under what conditions would blood transfusion be necessary in people?(Solved)
Under what conditions would blood transfusion be necessary in people?
Date posted: October 5, 2017. Answers (1)
- What is the difference between rhesus positive and Rhesus negative blood samples?(Solved)
What is the difference between rhesus positive and Rhesus negative blood samples?
Date posted: October 5, 2017. Answers (1)
- Explain the meaning of : (i)Universal donor (ii)Universal recipient(Solved)
Explain the meaning of :
(i) Universal donor
(ii) Universal recipient
Date posted: October 5, 2017. Answers (1)
- Explain why blood fowing in blood vessels does not normally clot(Solved)
Explain why blood ?owing in blood vessels does not normally clot
Date posted: October 5, 2017. Answers (1)
- State the role of blood clotting on wounds(Solved)
State the role of blood clotting on wounds
Date posted: October 5, 2017. Answers (1)
- Name a protein, vitamin, an enzyme and a mineral element involved in blood clotting(Solved)
Name a protein, vitamin, an enzyme and a mineral element involved in blood clotting
Date posted: October 5, 2017. Answers (1)
- Explain how oxygen and carbon Iv oxide are transported in the blood(Solved)
Explain how oxygen and carbon Iv oxide are transported in the blood
Date posted: October 5, 2017. Answers (1)
- How does the heart increase blood flow to some parts of the body during exercise(Solved)
How does the heart increase blood flow to some parts of the body during exercise
Date posted: October 5, 2017. Answers (1)