#[http://karnatakaeducation.org.in/KOER/en/index.php/Digestion_and_Respiration#Activity_No_1 carbondioxide is essential for photosynthesis] | #[http://karnatakaeducation.org.in/KOER/en/index.php/Digestion_and_Respiration#Activity_No_1 carbondioxide is essential for photosynthesis] |