Question

11. Some plants have deep red, violet or brown leaves. Do these leaves also carry
out photosynthesis? Explain. Name few such plants.
12. Leaves of desert plants are reduced to spines to prevent transpiration. How do
such plants prepare food?
13. How will you test that leaves contain carbohydrates in the form of starch?
Or
How would you test the presence of starch in leaves?
[NCERT]​

Answer 1

Answer:

11. yes, plants having red, violet or brown leaves also do photosynthesis bcoz light coming from sun is white light and white light consist of 7 colours so depending on the leave colour plant trap different wavelength colour light from the sun light and produce food.

12. in desert plant stem modified into leaves is used for photosynthesis (this modification is known as phylloclade).