Question

(i) Draw the diagram of cross section of a leaf and label the following Parts :

(a) chloroplast (b) cuticle

(ii) A gas is released during photosynthesis. Name the gas and also state the way in which the gas is evolved.

(iii) In certain group of plants, stomata *** closed during day. How is food synthesized by such plants ? Also name them.

Answer 1

(i)

(ii) Oxygen

By splitting of water 2H2O + splits →H2 + O2

(iii) They take up CO2 at night and prepare an intermediate which is acted upon by the energy absorbed by chlorophyll during the day.

1. Desert plants. [Xerophytic plants]