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While investigating a certain metabolic process in plants, students set up the apparatus as shown below in a classroom and monitored it for 48 hours.

(a) Identify the metabolic process under investigation.
(b) Account for the observations made in the test tube at the end of the investigation.

Answer Text:
a)- Respiration
b)- Plants carry out respiration producing carbon (IV) oxide gas which reacts with lime water/ calcium hydroxide forming a white precipitate/ insoluble calcium carbonate.