Question

stomata of desert plants remain closed during the day time. how do they take up CO2 and perform photosynthesis

Answer 1

stomata of desert plant opens up at night and takes in the carbon dioxide and prepares an intermediate which is acted upon by the sunlight concentrated during the day time and this is how carbondioxide is broken down to glucoseand photosynthesis occurs

Answer 2

they take CO2 in the night and the prepare an intermediate substance .
As the day shines they trap sunlight and perform photosynthesis