References

1. Ministry of Education (2017), secondary biology book one, Kenya Literature Bureau, fifth edition, Nairobi.

2. https://www.google.com/search?q=graphs+of+factors+affecting+the+rate+of+photosynthesis+in+plants&source=lnms&tbm=isch&sa=X&ved=0ahUKEwj5i76C48XkAhWYiFwKHb4dCt4Q_AUIEigB&biw=1366&bih=608

3. https://www.google.com/search?q=chloroplasts+structure&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjO-5qu5cXkAhWMN8AKHQnGASwQ_AUIEigB&biw=1366&bih=608 

4. https://www.google.com/search?q=photosynthesis&tbm=vid&source=lnms&sa=X&ved=0ahUKEwialeCl5sXkAhWtQUEAHa2NCI0Q_AUIDigC&biw=1366&bih=608&dpr=1