Respiration in plants happens:
Photosynthesis and respiration do not happen simultaneously in plants during _____.
(i) In plants, respiration happens during the night time only, while photosynthesis happens during the day.
(ii) In humans, the exchange of gases takes place in the alveoli.
(iii) Haemoglobin has a greater affinity for oxygen than carbon dioxide.
(iv) Aquatic organisms use the oxygen in the surrounding atmosphere for respiration. [0.8 Mark]